102491125 has 32 divisors (see below), whose sum is σ = 140849280. Its totient is φ = 73840000.

The previous prime is 102491119. The next prime is 102491131. The reversal of 102491125 is 521194201.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (102491119) and next prime (102491131).

It is not a de Polignac number, because 102491125 - 2³ = 102491117 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a self number, because there is not a number n which added to its sum of digits gives 102491125.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 179841 + ... + 180409.

It is an arithmetic number, because the mean of its divisors is an integer number (4401540).

Almost surely, 2^102491125 is an apocalyptic number.

It is an amenable number.

102491125 is a deficient number, since it is larger than the sum of its proper divisors (38358155).

102491125 is a wasteful number, since it uses less digits than its factorization.

102491125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 726 (or 716 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 102491125 is about 10123.7900511617. The cubic root of 102491125 is about 467.9815735921.

The spelling of 102491125 in words is "one hundred two million, four hundred ninety-one thousand, one hundred twenty-five".