126501139 has 2 divisors, whose sum is σ = 126501140. Its totient is φ = 126501138.

The previous prime is 126501101. The next prime is 126501157. The reversal of 126501139 is 931105621.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 126501139 - 2¹⁵ = 126468371 is a prime.

It is equal to p_7190722 and since 126501139 and 7190722 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 (126501169) 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, 63250569 + 63250570.

It is an arithmetic number, because the mean of its divisors is an integer number (63250570).

Almost surely, 2^126501139 is an apocalyptic number.

126501139 is a deficient number, since it is larger than the sum of its proper divisors (1).

126501139 is an equidigital number, since it uses as much as digits as its factorization.

126501139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 126501139 is about 11247.2725138142. The cubic root of 126501139 is about 501.9935595434.

The spelling of 126501139 in words is "one hundred twenty-six million, five hundred one thousand, one hundred thirty-nine".