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142441444 = 2235610361
BaseRepresentation
bin10000111110101…
…11101111100100
3100221000202221001
420133113233210
5242431111234
622045003044
73346506115
oct1037275744
9327022831
10142441444
117344a402
123b853484
13236836a2
1414cbc20c
15c789d14
hex87d7be4

142441444 has 6 divisors (see below), whose sum is σ = 249272534. Its totient is φ = 71220720.

The previous prime is 142441427. The next prime is 142441447. The reversal of 142441444 is 444144241.

It can be written as a sum of positive squares in only one way, i.e., 133679844 + 8761600 = 11562^2 + 2960^2 .

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (142441447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17805177 + ... + 17805184.

Almost surely, 2142441444 is an apocalyptic number.

It is an amenable number.

142441444 is a deficient number, since it is larger than the sum of its proper divisors (106831090).

142441444 is a wasteful number, since it uses less digits than its factorization.

142441444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35610365 (or 35610363 counting only the distinct ones).

The product of its digits is 8192, while the sum is 28.

The square root of 142441444 is about 11934.8834933568. The cubic root of 142441444 is about 522.2504095511.

Adding to 142441444 its reverse (444144241), we get a palindrome (586585685).

The spelling of 142441444 in words is "one hundred forty-two million, four hundred forty-one thousand, four hundred forty-four".

Divisors: 1 2 4 35610361 71220722 142441444