102472731 has 12 divisors (see below), whose sum is σ = 149680440. Its totient is φ = 67547040.

The previous prime is 102472729. The next prime is 102472759. The reversal of 102472731 is 137274201.

It is a happy number.

It is not a de Polignac number, because 102472731 - 2¹ = 102472729 is a prime.

It is a super-2 number, since 2×102472731² = 21001321197196722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 102472695 and 102472704.

It is not an unprimeable number, because it can be changed into a prime (102472781) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 63165 + ... + 64766.

It is an arithmetic number, because the mean of its divisors is an integer number (12473370).

Almost surely, 2^102472731 is an apocalyptic number.

102472731 is a deficient number, since it is larger than the sum of its proper divisors (47207709).

102472731 is a wasteful number, since it uses less digits than its factorization.

102472731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128026 (or 128023 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 27.

The square root of 102472731 is about 10122.8815561578. The cubic root of 102472731 is about 467.9535758246.

The spelling of 102472731 in words is "one hundred two million, four hundred seventy-two thousand, seven hundred thirty-one".