40225725 has 18 divisors (see below), whose sum is σ = 72049146. Its totient is φ = 21453600.

The previous prime is 40225721. The next prime is 40225727. The reversal of 40225725 is 52752204.

40225725 is a `hidden beast` number, since 402 + 257 + 2 + 5 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 4761 + 40220964 = 69^2 + 6342^2 .

It is not a de Polignac number, because 40225725 - 2² = 40225721 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40225721) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 89166 + ... + 89615.

Almost surely, 2^40225725 is an apocalyptic number.

40225725 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

40225725 is a deficient number, since it is larger than the sum of its proper divisors (31823421).

40225725 is a wasteful number, since it uses less digits than its factorization.

40225725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178797 (or 178789 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 27.

The square root of 40225725 is about 6342.3753436705. The cubic root of 40225725 is about 342.6372902281.

Adding to 40225725 its reverse (52752204), we get a palindrome (92977929).

The spelling of 40225725 in words is "forty million, two hundred twenty-five thousand, seven hundred twenty-five".