142302531 has 16 divisors (see below), whose sum is σ = 219898368. Its totient is φ = 80169600.

The previous prime is 142302499. The next prime is 142302553. The reversal of 142302531 is 135203241.

It is not a de Polignac number, because 142302531 - 2⁵ = 142302499 is a prime.

It is a super-2 number, since 2×142302531² = 40500020658011922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 142302498 and 142302507.

It is not an unprimeable number, because it can be changed into a prime (142302581) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46230 + ... + 49211.

It is an arithmetic number, because the mean of its divisors is an integer number (13743648).

Almost surely, 2^142302531 is an apocalyptic number.

142302531 is a deficient number, since it is larger than the sum of its proper divisors (77595837).

142302531 is an equidigital number, since it uses as much as digits as its factorization.

142302531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95522.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 142302531 is about 11929.0624526825. The cubic root of 142302531 is about 522.0805831173.

Adding to 142302531 its reverse (135203241), we get a palindrome (277505772).

It can be divided in two parts, 14230 and 2531, that added together give a palindrome (16761).

The spelling of 142302531 in words is "one hundred forty-two million, three hundred two thousand, five hundred thirty-one".