102540931 has 8 divisors (see below), whose sum is σ = 103857264. Its totient is φ = 101230080.

The previous prime is 102540883. The next prime is 102540937. The reversal of 102540931 is 139045201.

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 102540931 - 2⁷ = 102540803 is a prime.

It is a super-2 number, since 2×102540931² = 21029285060693522, 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 = 102540896 and 102540905.

It is not an unprimeable number, because it can be changed into a prime (102540937) 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, 46551 + ... + 48703.

It is an arithmetic number, because the mean of its divisors is an integer number (12982158).

Almost surely, 2^102540931 is an apocalyptic number.

102540931 is a deficient number, since it is larger than the sum of its proper divisors (1316333).

102540931 is an equidigital number, since it uses as much as digits as its factorization.

102540931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2741.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 102540931 is about 10126.2496019010. The cubic root of 102540931 is about 468.0573671976.

The spelling of 102540931 in words is "one hundred two million, five hundred forty thousand, nine hundred thirty-one".