32145021 has 24 divisors (see below), whose sum is σ = 48672000. Its totient is φ = 20416032.

The previous prime is 32145013. The next prime is 32145041. The reversal of 32145021 is 12054123.

It is not a de Polignac number, because 32145021 - 2³ = 32145013 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 32144985 and 32145003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32145041) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19840 + ... + 21398.

It is an arithmetic number, because the mean of its divisors is an integer number (2028000).

Almost surely, 2^32145021 is an apocalyptic number.

It is an amenable number.

32145021 is a deficient number, since it is larger than the sum of its proper divisors (16526979).

32145021 is a wasteful number, since it uses less digits than its factorization.

32145021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1673 (or 1670 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 32145021 is about 5669.6579261892. The cubic root of 32145021 is about 317.9590845662.

Adding to 32145021 its reverse (12054123), we get a palindrome (44199144).

The spelling of 32145021 in words is "thirty-two million, one hundred forty-five thousand, twenty-one".