45634721 has 4 divisors (see below), whose sum is σ = 49783344. Its totient is φ = 41486100.

The previous prime is 45634663. The next prime is 45634733. The reversal of 45634721 is 12743654.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-45634721 is a prime.

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

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (45634741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2074295 + ... + 2074316.

It is an arithmetic number, because the mean of its divisors is an integer number (12445836).

Almost surely, 2^45634721 is an apocalyptic number.

It is an amenable number.

45634721 is a deficient number, since it is larger than the sum of its proper divisors (4148623).

45634721 is a wasteful number, since it uses less digits than its factorization.

45634721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4148622.

The product of its digits is 20160, while the sum is 32.

The square root of 45634721 is about 6755.3475854319. The cubic root of 45634721 is about 357.3538509659.

The spelling of 45634721 in words is "forty-five million, six hundred thirty-four thousand, seven hundred twenty-one".