45361721 has 16 divisors (see below), whose sum is σ = 49459200. Its totient is φ = 41462928.

The previous prime is 45361699. The next prime is 45361753. The reversal of 45361721 is 12716354.

It is a cyclic number.

It is not a de Polignac number, because 45361721 - 2²² = 41167417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45361021) 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, 70226 + ... + 70868.

It is an arithmetic number, because the mean of its divisors is an integer number (3091200).

Almost surely, 2^45361721 is an apocalyptic number.

It is an amenable number.

45361721 is a deficient number, since it is larger than the sum of its proper divisors (4097479).

45361721 is a wasteful number, since it uses less digits than its factorization.

45361721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 788.

The product of its digits is 5040, while the sum is 29.

The square root of 45361721 is about 6735.1110607027. Note that the first 3 decimals coincide. The cubic root of 45361721 is about 356.6398274657.

The spelling of 45361721 in words is "forty-five million, three hundred sixty-one thousand, seven hundred twenty-one".