102542431 has 4 divisors (see below), whose sum is σ = 102566512. Its totient is φ = 102518352.

The previous prime is 102542423. The next prime is 102542471. The reversal of 102542431 is 134245201.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 102542431 - 2³ = 102542423 is a prime.

It is a super-2 number, since 2×102542431² = 21029900310779522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102542471) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3750 + ... + 14803.

It is an arithmetic number, because the mean of its divisors is an integer number (25641628).

Almost surely, 2^102542431 is an apocalyptic number.

102542431 is a deficient number, since it is larger than the sum of its proper divisors (24081).

102542431 is an equidigital number, since it uses as much as digits as its factorization.

102542431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24080.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 102542431 is about 10126.3236665633. The cubic root of 102542431 is about 468.0596494817.

Adding to 102542431 its reverse (134245201), we get a palindrome (236787632).

The spelling of 102542431 in words is "one hundred two million, five hundred forty-two thousand, four hundred thirty-one".