45921945 has 8 divisors (see below), whose sum is σ = 73475136. Its totient is φ = 24491696.

The previous prime is 45921937. The next prime is 45921971. The reversal of 45921945 is 54912954.

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 45921945 - 2³ = 45921937 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1530717 + ... + 1530746.

It is an arithmetic number, because the mean of its divisors is an integer number (9184392).

Almost surely, 2^45921945 is an apocalyptic number.

It is an amenable number.

45921945 is a deficient number, since it is larger than the sum of its proper divisors (27553191).

45921945 is a wasteful number, since it uses less digits than its factorization.

45921945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3061471.

The product of its digits is 64800, while the sum is 39.

The square root of 45921945 is about 6776.5732490692. The cubic root of 45921945 is about 358.1020094644.

The spelling of 45921945 in words is "forty-five million, nine hundred twenty-one thousand, nine hundred forty-five".