45732021 has 8 divisors (see below), whose sum is σ = 62009760. Its totient is φ = 29971152.

The previous prime is 45732019. The next prime is 45732041. The reversal of 45732021 is 12023754.

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

It is not a de Polignac number, because 45732021 - 2¹ = 45732019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 45731982 and 45732000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45732041) 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, 129010 + ... + 129363.

It is an arithmetic number, because the mean of its divisors is an integer number (7751220).

Almost surely, 2^45732021 is an apocalyptic number.

It is an amenable number.

45732021 is a deficient number, since it is larger than the sum of its proper divisors (16277739).

45732021 is a wasteful number, since it uses less digits than its factorization.

45732021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258435.

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 45732021 is about 6762.5454527123. The cubic root of 45732021 is about 357.6076478278.

Adding to 45732021 its reverse (12023754), we get a palindrome (57755775).

The spelling of 45732021 in words is "forty-five million, seven hundred thirty-two thousand, twenty-one".