45721725 has 48 divisors (see below), whose sum is σ = 87649152. Its totient is φ = 20597760.

The previous prime is 45721691. The next prime is 45721727. The reversal of 45721725 is 52712754.

It is not a de Polignac number, because 45721725 - 2⁹ = 45721213 is a prime.

It is a super-2 number, since 2×45721725² = 4180952273951250, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45721727) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 37729 + ... + 38921.

It is an arithmetic number, because the mean of its divisors is an integer number (1826024).

Almost surely, 2^45721725 is an apocalyptic number.

It is an amenable number.

45721725 is a deficient number, since it is larger than the sum of its proper divisors (41927427).

45721725 is a wasteful number, since it uses less digits than its factorization.

45721725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1286 (or 1281 counting only the distinct ones).

The product of its digits is 19600, while the sum is 33.

The square root of 45721725 is about 6761.7841580459. The cubic root of 45721725 is about 357.5808088310.

The spelling of 45721725 in words is "forty-five million, seven hundred twenty-one thousand, seven hundred twenty-five".