102725431 has 8 divisors (see below), whose sum is σ = 107292240. Its totient is φ = 98252928.

The previous prime is 102725417. The next prime is 102725437. The reversal of 102725431 is 134527201.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 102725431 - 2²⁵ = 69170999 is a prime.

It is a super-2 number, since 2×102725431² = 21105028348271522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102725396 and 102725405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102725437) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21346 + ... + 25711.

It is an arithmetic number, because the mean of its divisors is an integer number (13411530).

Almost surely, 2^102725431 is an apocalyptic number.

102725431 is a deficient number, since it is larger than the sum of its proper divisors (4566809).

102725431 is an equidigital number, since it uses as much as digits as its factorization.

102725431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47153.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 102725431 is about 10135.3554945054. The cubic root of 102725431 is about 468.3379213199.

The spelling of 102725431 in words is "one hundred two million, seven hundred twenty-five thousand, four hundred thirty-one".