102521997 has 8 divisors (see below), whose sum is σ = 151884480. Its totient is φ = 68347980.

The previous prime is 102521987. The next prime is 102522011. The reversal of 102521997 is 799125201.

It is not a de Polignac number, because 102521997 - 2⁷ = 102521869 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102521987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1898529 + ... + 1898582.

It is an arithmetic number, because the mean of its divisors is an integer number (18985560).

Almost surely, 2^102521997 is an apocalyptic number.

It is an amenable number.

102521997 is a deficient number, since it is larger than the sum of its proper divisors (49362483).

102521997 is an equidigital number, since it uses as much as digits as its factorization.

102521997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3797120 (or 3797114 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 36.

The square root of 102521997 is about 10125.3146617772. The cubic root of 102521997 is about 468.0285567716.

The spelling of 102521997 in words is "one hundred two million, five hundred twenty-one thousand, nine hundred ninety-seven".