126865031 has 2 divisors, whose sum is σ = 126865032. Its totient is φ = 126865030.

The previous prime is 126865027. The next prime is 126865043. The reversal of 126865031 is 130568621.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 126865031 - 2² = 126865027 is a prime.

It is a super-2 number, since 2×126865031² = 32189472181261922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126865331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63432515 + 63432516.

It is an arithmetic number, because the mean of its divisors is an integer number (63432516).

Almost surely, 2^126865031 is an apocalyptic number.

126865031 is a deficient number, since it is larger than the sum of its proper divisors (1).

126865031 is an equidigital number, since it uses as much as digits as its factorization.

126865031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 126865031 is about 11263.4377966942. The cubic root of 126865031 is about 502.4744420720.

The spelling of 126865031 in words is "one hundred twenty-six million, eight hundred sixty-five thousand, thirty-one".