126949531 has 2 divisors, whose sum is σ = 126949532. Its totient is φ = 126949530.

The previous prime is 126949513. The next prime is 126949541. The reversal of 126949531 is 135949621.

Together with previous prime (126949513) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 126949531 - 2⁵ = 126949499 is a prime.

It is a super-2 number, since 2×126949531² = 32232366842239922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (126949541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63474765 + 63474766.

It is an arithmetic number, because the mean of its divisors is an integer number (63474766).

Almost surely, 2^126949531 is an apocalyptic number.

126949531 is a deficient number, since it is larger than the sum of its proper divisors (1).

126949531 is an equidigital number, since it uses as much as digits as its factorization.

126949531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 58320, while the sum is 40.

The square root of 126949531 is about 11267.1882472958. The cubic root of 126949531 is about 502.5859770545.

The spelling of 126949531 in words is "one hundred twenty-six million, nine hundred forty-nine thousand, five hundred thirty-one".