45720025 has 12 divisors (see below), whose sum is σ = 61054252. Its totient is φ = 33762240.

The previous prime is 45720011. The next prime is 45720041. The reversal of 45720025 is 52002754.

It can be written as a sum of positive squares in 6 ways, for example, as 10055241 + 35664784 = 3171^2 + 5972^2 .

It is not a de Polignac number, because 45720025 - 2¹⁷ = 45588953 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 70014 + ... + 70663.

Almost surely, 2^45720025 is an apocalyptic number.

It is an amenable number.

45720025 is a deficient number, since it is larger than the sum of its proper divisors (15334227).

45720025 is a wasteful number, since it uses less digits than its factorization.

45720025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140700 (or 140695 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 25.

The square root of 45720025 is about 6761.6584504099. The cubic root of 45720025 is about 357.5763769852.

Adding to 45720025 its reverse (52002754), we get a palindrome (97722779).

The spelling of 45720025 in words is "forty-five million, seven hundred twenty thousand, twenty-five".