Search a number
-
+
145433421 = 3372372971
BaseRepresentation
bin10001010101100…
…10001101001101
3101010122210011000
420222302031031
5244212332141
622233050513
73414110100
oct1052621515
9333583130
10145433421
1175103311
1240856a39
13241904a3
141545a737
15cb7b5b6
hex8ab234d

145433421 has 48 divisors (see below), whose sum is σ = 257494080. Its totient is φ = 80831520.

The previous prime is 145433411. The next prime is 145433441. The reversal of 145433421 is 124334541.

It is a happy number.

It is not a de Polignac number, because 145433421 - 25 = 145433389 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145433401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 47466 + ... + 50436.

It is an arithmetic number, because the mean of its divisors is an integer number (5364460).

Almost surely, 2145433421 is an apocalyptic number.

It is an amenable number.

145433421 is a deficient number, since it is larger than the sum of its proper divisors (112060659).

145433421 is a wasteful number, since it uses less digits than its factorization.

145433421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3031 (or 3018 counting only the distinct ones).

The product of its digits is 5760, while the sum is 27.

The square root of 145433421 is about 12059.5779776906. The cubic root of 145433421 is about 525.8817183572.

Adding to 145433421 its reverse (124334541), we get a palindrome (269767962).

The spelling of 145433421 in words is "one hundred forty-five million, four hundred thirty-three thousand, four hundred twenty-one".

Divisors: 1 3 7 9 21 27 37 49 63 111 147 189 259 333 441 777 999 1323 1813 2331 2971 5439 6993 8913 16317 20797 26739 48951 62391 80217 109927 145579 187173 329781 436737 561519 769489 989343 1310211 2308467 2968029 3930633 5386423 6925401 16159269 20776203 48477807 145433421