125867531 has 2 divisors, whose sum is σ = 125867532. Its totient is φ = 125867530.

The previous prime is 125867519. The next prime is 125867543. The reversal of 125867531 is 135768521.

It is a balanced prime because it is at equal distance from previous prime (125867519) and next prime (125867543).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125867531 is a prime.

It is a super-2 number, since 2×125867531² = 31685270720071922, which contains 22 as substring.

It is a Sophie Germain prime.

It is equal to p_7156658 and since 125867531 and 7156658 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (125863531) 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, 62933765 + 62933766.

It is an arithmetic number, because the mean of its divisors is an integer number (62933766).

Almost surely, 2^125867531 is an apocalyptic number.

125867531 is a deficient number, since it is larger than the sum of its proper divisors (1).

125867531 is an equidigital number, since it uses as much as digits as its factorization.

125867531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 50400, while the sum is 38.

The square root of 125867531 is about 11219.0699703674. The cubic root of 125867531 is about 501.1540423233.

The spelling of 125867531 in words is "one hundred twenty-five million, eight hundred sixty-seven thousand, five hundred thirty-one".