102490409 has 24 divisors (see below), whose sum is σ = 122923008. Its totient is φ = 85162560.

The previous prime is 102490363. The next prime is 102490429. The reversal of 102490409 is 904094201.

It is not a de Polignac number, because 102490409 - 2⁸ = 102490153 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102490429) 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 23 ways as a sum of consecutive naturals, for example, 439757 + ... + 439989.

It is an arithmetic number, because the mean of its divisors is an integer number (5121792).

Almost surely, 2^102490409 is an apocalyptic number.

It is an amenable number.

102490409 is a deficient number, since it is larger than the sum of its proper divisors (20432599).

102490409 is a wasteful number, since it uses less digits than its factorization.

102490409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 485 (or 478 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 102490409 is about 10123.7546888494. The cubic root of 102490409 is about 467.9804838210.

The spelling of 102490409 in words is "one hundred two million, four hundred ninety thousand, four hundred nine".