102925921 has 12 divisors (see below), whose sum is σ = 123594240. Its totient is φ = 85375080.

The previous prime is 102925909. The next prime is 102925967. The reversal of 102925921 is 129529201.

It is not a de Polignac number, because 102925921 - 2¹³ = 102917729 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is not an unprimeable number, because it can be changed into a prime (102925421) 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, 32361 + ... + 35398.

It is an arithmetic number, because the mean of its divisors is an integer number (10299520).

Almost surely, 2^102925921 is an apocalyptic number.

It is an amenable number.

102925921 is a deficient number, since it is larger than the sum of its proper divisors (20668319).

102925921 is an equidigital number, since it uses as much as digits as its factorization.

102925921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67804 (or 67797 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 31.

The square root of 102925921 is about 10145.2412982639. The cubic root of 102925921 is about 468.6424095352.

The spelling of 102925921 in words is "one hundred two million, nine hundred twenty-five thousand, nine hundred twenty-one".