45878721 has 48 divisors (see below), whose sum is σ = 76268544. Its totient is φ = 23972256.

The previous prime is 45878717. The next prime is 45878731. The reversal of 45878721 is 12787854.

It is not a de Polignac number, because 45878721 - 2² = 45878717 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (45878731) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 976120 + ... + 976166.

It is an arithmetic number, because the mean of its divisors is an integer number (1588928).

Almost surely, 2^45878721 is an apocalyptic number.

It is an amenable number.

45878721 is a deficient number, since it is larger than the sum of its proper divisors (30389823).

45878721 is a wasteful number, since it uses less digits than its factorization.

45878721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170 (or 123 counting only the distinct ones).

The product of its digits is 125440, while the sum is 42.

The square root of 45878721 is about 6773.3832757345. The cubic root of 45878721 is about 357.9896197691.

The spelling of 45878721 in words is "forty-five million, eight hundred seventy-eight thousand, seven hundred twenty-one".