45905921 has 8 divisors (see below), whose sum is σ = 46800864. Its totient is φ = 45017280.

The previous prime is 45905903. The next prime is 45905939. The reversal of 45905921 is 12950954.

It is an interprime number because it is at equal distance from previous prime (45905903) and next prime (45905939).

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 45905921 - 2¹⁸ = 45643777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45905971) 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 7 ways as a sum of consecutive naturals, for example, 14726 + ... + 17568.

It is an arithmetic number, because the mean of its divisors is an integer number (5850108).

Almost surely, 2^45905921 is an apocalyptic number.

It is an amenable number.

45905921 is a deficient number, since it is larger than the sum of its proper divisors (894943).

45905921 is a wasteful number, since it uses less digits than its factorization.

45905921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3151.

The product of its (nonzero) digits is 16200, while the sum is 35.

The square root of 45905921 is about 6775.3908374351. The cubic root of 45905921 is about 358.0603525894.

The spelling of 45905921 in words is "forty-five million, nine hundred five thousand, nine hundred twenty-one".