126139867 has 12 divisors (see below), whose sum is σ = 148252440. Its totient is φ = 107001216.

The previous prime is 126139781. The next prime is 126139883. The reversal of 126139867 is 768931621.

It is not a de Polignac number, because 126139867 - 2²³ = 117751259 is a prime.

It is a super-2 number, since 2×126139867² = 31822532093555378, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (126139267) 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 in 11 ways as a sum of consecutive naturals, for example, 8517 + ... + 18022.

It is an arithmetic number, because the mean of its divisors is an integer number (12354370).

Almost surely, 2^126139867 is an apocalyptic number.

126139867 is a deficient number, since it is larger than the sum of its proper divisors (22112573).

126139867 is an equidigital number, since it uses as much as digits as its factorization.

126139867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26650 (or 26643 counting only the distinct ones).

The product of its digits is 108864, while the sum is 43.

The square root of 126139867 is about 11231.2006036755. The cubic root of 126139867 is about 501.5152262073.

The spelling of 126139867 in words is "one hundred twenty-six million, one hundred thirty-nine thousand, eight hundred sixty-seven".