102421056 has 56 divisors (see below), whose sum is σ = 286938720. Its totient is φ = 32131072.

The previous prime is 102421049. The next prime is 102421057. The reversal of 102421056 is 650124201.

It is not an unprimeable number, because it can be changed into a prime (102421057) 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, 12426 + ... + 18953.

Almost surely, 2^102421056 is an apocalyptic number.

102421056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

102421056 is an abundant number, since it is smaller than the sum of its proper divisors (184517664).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

102421056 is a wasteful number, since it uses less digits than its factorization.

102421056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31411 (or 31401 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 102421056 is about 10120.3288484120. The cubic root of 102421056 is about 467.8749026443.

Adding to 102421056 its reverse (650124201), we get a palindrome (752545257).

The spelling of 102421056 in words is "one hundred two million, four hundred twenty-one thousand, fifty-six".