32420921 has 8 divisors (see below), whose sum is σ = 36968904. Its totient is φ = 28166400.

The previous prime is 32420909. The next prime is 32420933. The reversal of 32420921 is 12902423.

It is an interprime number because it is at equal distance from previous prime (32420909) and next prime (32420933).

It can be written as a sum of positive squares in 4 ways, for example, as 6817321 + 25603600 = 2611^2 + 5060^2 .

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 32420921 - 2¹⁰ = 32419897 is a prime.

It is a super-2 number, since 2×32420921² = 2102232236976482, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (32420981) 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, 73130 + ... + 73571.

It is an arithmetic number, because the mean of its divisors is an integer number (4621113).

Almost surely, 2^32420921 is an apocalyptic number.

It is an amenable number.

32420921 is a deficient number, since it is larger than the sum of its proper divisors (4547983).

32420921 is a wasteful number, since it uses less digits than its factorization.

32420921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146731.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 32420921 is about 5693.9372142657. The cubic root of 32420921 is about 318.8661729046.

The spelling of 32420921 in words is "thirty-two million, four hundred twenty thousand, nine hundred twenty-one".