102490421 has 8 divisors (see below), whose sum is σ = 111895104. Its totient is φ = 93100320.

The previous prime is 102490363. The next prime is 102490429. The reversal of 102490421 is 124094201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 102490421 - 2⁶ = 102490357 is a prime.

It is a Duffinian 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 polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15416 + ... + 21038.

It is an arithmetic number, because the mean of its divisors is an integer number (13986888).

Almost surely, 2^102490421 is an apocalyptic number.

102490421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

102490421 is a deficient number, since it is larger than the sum of its proper divisors (9404683).

102490421 is a wasteful number, since it uses less digits than its factorization.

102490421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7291.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 102490421 is about 10123.7552815149. The cubic root of 102490421 is about 467.9805020854.

The spelling of 102490421 in words is "one hundred two million, four hundred ninety thousand, four hundred twenty-one".