40125757 has 12 divisors (see below), whose sum is σ = 47817756. Its totient is φ = 33552960.

The previous prime is 40125727. The next prime is 40125773. The reversal of 40125757 is 75752104.

It can be written as a sum of positive squares in 2 ways, for example, as 7338681 + 32787076 = 2709^2 + 5726^2 .

It is not a de Polignac number, because 40125757 - 2¹⁵ = 40092989 is a prime.

It is a super-2 number, since 2×40125757² = 3220152749646098, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40125727) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7978 + ... + 11995.

It is an arithmetic number, because the mean of its divisors is an integer number (3984813).

Almost surely, 2^40125757 is an apocalyptic number.

It is an amenable number.

40125757 is a deficient number, since it is larger than the sum of its proper divisors (7691999).

40125757 is a wasteful number, since it uses less digits than its factorization.

40125757 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20028 (or 20021 counting only the distinct ones).

The product of its (nonzero) digits is 9800, while the sum is 31.

The square root of 40125757 is about 6334.4894821919. The cubic root of 40125757 is about 342.3532168018.

The spelling of 40125757 in words is "forty million, one hundred twenty-five thousand, seven hundred fifty-seven".