45736921 has 6 divisors (see below), whose sum is σ = 47007870. Its totient is φ = 44499456.

The previous prime is 45736913. The next prime is 45736927. The reversal of 45736921 is 12963754.

It can be written as a sum of positive squares in 3 ways, for example, as 17264025 + 28472896 = 4155^2 + 5336^2 .

It is not a de Polignac number, because 45736921 - 2³ = 45736913 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45736927) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 15336 + ... + 18073.

It is an arithmetic number, because the mean of its divisors is an integer number (7834645).

Almost surely, 2^45736921 is an apocalyptic number.

It is an amenable number.

45736921 is a deficient number, since it is larger than the sum of its proper divisors (1270949).

45736921 is an equidigital number, since it uses as much as digits as its factorization.

45736921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33483 (or 33446 counting only the distinct ones).

The product of its digits is 45360, while the sum is 37.

The square root of 45736921 is about 6762.9077326251. The cubic root of 45736921 is about 357.6204194398.

The spelling of 45736921 in words is "forty-five million, seven hundred thirty-six thousand, nine hundred twenty-one".