Search a number
-
+
145442 = 2112601
BaseRepresentation
bin100011100000100010
321101111202
4203200202
514123232
63041202
71144013
oct434042
9241452
10145442
119a300
1270202
135127b
143b00a
152d162
hex23822

145442 has 12 divisors (see below), whose sum is σ = 240198. Its totient is φ = 66000.

The previous prime is 145441. The next prime is 145451. The reversal of 145442 is 244541.

It can be written as a sum of positive squares in only one way, i.e., 101761 + 43681 = 319^2 + 209^2 .

It is an Ulam number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 145442.

It is not an unprimeable number, because it can be changed into a prime (145441) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 59 + ... + 542.

2145442 is an apocalyptic number.

145442 is a deficient number, since it is larger than the sum of its proper divisors (94756).

145442 is a wasteful number, since it uses less digits than its factorization.

145442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 625 (or 614 counting only the distinct ones).

The product of its digits is 640, while the sum is 20.

The square root of 145442 is about 381.3685881139. The cubic root of 145442 is about 52.5892058600.

Adding to 145442 its reverse (244541), we get a palindrome (389983).

Subtracting 145442 from its reverse (244541), we obtain a palindrome (99099).

The spelling of 145442 in words is "one hundred forty-five thousand, four hundred forty-two".

Divisors: 1 2 11 22 121 242 601 1202 6611 13222 72721 145442