40125139 has 2 divisors, whose sum is σ = 40125140. Its totient is φ = 40125138.

The previous prime is 40125103. The next prime is 40125143. The reversal of 40125139 is 93152104.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40125139 - 2¹⁷ = 39994067 is a prime.

It is a super-2 number, since 2×40125139² = 3220053559538642, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40125199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20062569 + 20062570.

It is an arithmetic number, because the mean of its divisors is an integer number (20062570).

Almost surely, 2^40125139 is an apocalyptic number.

40125139 is a deficient number, since it is larger than the sum of its proper divisors (1).

40125139 is an equidigital number, since it uses as much as digits as its factorization.

40125139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 40125139 is about 6334.4407014353. The cubic root of 40125139 is about 342.3514591994.

The spelling of 40125139 in words is "forty million, one hundred twenty-five thousand, one hundred thirty-nine".