102432021 has 32 divisors (see below), whose sum is σ = 156389760. Its totient is φ = 59222016.

The previous prime is 102432017. The next prime is 102432037. The reversal of 102432021 is 120234201.

It is not a de Polignac number, because 102432021 - 2² = 102432017 is a prime.

It is a super-2 number, since 2×102432021² = 20984637852288882, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102432521) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34425 + ... + 37281.

It is an arithmetic number, because the mean of its divisors is an integer number (4887180).

Almost surely, 2^102432021 is an apocalyptic number.

It is an amenable number.

102432021 is a deficient number, since it is larger than the sum of its proper divisors (53957739).

102432021 is a wasteful number, since it uses less digits than its factorization.

102432021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2933.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 102432021 is about 10120.8705653219. The cubic root of 102432021 is about 467.8915986423.

Adding to 102432021 its reverse (120234201), we get a palindrome (222666222).

The spelling of 102432021 in words is "one hundred two million, four hundred thirty-two thousand, twenty-one".