126249131 has 2 divisors, whose sum is σ = 126249132. Its totient is φ = 126249130.

The previous prime is 126249103. The next prime is 126249173. The reversal of 126249131 is 131942621.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 126249131 - 2¹⁴ = 126232747 is a prime.

It is a super-2 number, since 2×126249131² = 31877686156510322, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 126249094 and 126249103.

It is not a weakly prime, because it can be changed into another prime (126239131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63124565 + 63124566.

It is an arithmetic number, because the mean of its divisors is an integer number (63124566).

Almost surely, 2^126249131 is an apocalyptic number.

126249131 is a deficient number, since it is larger than the sum of its proper divisors (1).

126249131 is an equidigital number, since it uses as much as digits as its factorization.

126249131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2592, while the sum is 29.

The square root of 126249131 is about 11236.0638570631. The cubic root of 126249131 is about 501.6599907624.

The spelling of 126249131 in words is "one hundred twenty-six million, two hundred forty-nine thousand, one hundred thirty-one".