45144921 has 16 divisors (see below), whose sum is σ = 62063424. Its totient is φ = 29168064.

The previous prime is 45144917. The next prime is 45144937. The reversal of 45144921 is 12944154.

It is not a de Polignac number, because 45144921 - 2² = 45144917 is a prime.

It is not an unprimeable number, because it can be changed into a prime (45144901) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34546 + ... + 35828.

It is an arithmetic number, because the mean of its divisors is an integer number (3878964).

Almost surely, 2^45144921 is an apocalyptic number.

It is an amenable number.

45144921 is a deficient number, since it is larger than the sum of its proper divisors (16918503).

45144921 is a wasteful number, since it uses less digits than its factorization.

45144921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1640.

The product of its digits is 5760, while the sum is 30.

The square root of 45144921 is about 6718.9970233659. The cubic root of 45144921 is about 356.0707498362.

The spelling of 45144921 in words is "forty-five million, one hundred forty-four thousand, nine hundred twenty-one".