45990921 has 8 divisors (see below), whose sum is σ = 61560864. Its totient is φ = 30540800.

The previous prime is 45990911. The next prime is 45990929. The reversal of 45990921 is 12909954.

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 45990921 - 2⁷ = 45990793 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 45990921.

It is not an unprimeable number, because it can be changed into a prime (45990929) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29055 + ... + 30596.

It is an arithmetic number, because the mean of its divisors is an integer number (7695108).

Almost surely, 2^45990921 is an apocalyptic number.

It is an amenable number.

45990921 is a deficient number, since it is larger than the sum of its proper divisors (15569943).

45990921 is a wasteful number, since it uses less digits than its factorization.

45990921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59911.

The product of its (nonzero) digits is 29160, while the sum is 39.

The square root of 45990921 is about 6781.6606373366. The cubic root of 45990921 is about 358.2812127306.

The spelling of 45990921 in words is "forty-five million, nine hundred ninety thousand, nine hundred twenty-one".