126551291 has 2 divisors, whose sum is σ = 126551292. Its totient is φ = 126551290.

The previous prime is 126551287. The next prime is 126551303. The reversal of 126551291 is 192155621.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 126551291 - 2² = 126551287 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (126551591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63275645 + 63275646.

It is an arithmetic number, because the mean of its divisors is an integer number (63275646).

Almost surely, 2^126551291 is an apocalyptic number.

126551291 is a deficient number, since it is larger than the sum of its proper divisors (1).

126551291 is an equidigital number, since it uses as much as digits as its factorization.

126551291 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5400, while the sum is 32.

The square root of 126551291 is about 11249.5018111915. The cubic root of 126551291 is about 502.0598900521.

The spelling of 126551291 in words is "one hundred twenty-six million, five hundred fifty-one thousand, two hundred ninety-one".