126551311 has 2 divisors, whose sum is σ = 126551312. Its totient is φ = 126551310.

The previous prime is 126551303. The next prime is 126551351. The reversal of 126551311 is 113155621.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 126551311 - 2³ = 126551303 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126551351) 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, 63275655 + 63275656.

It is an arithmetic number, because the mean of its divisors is an integer number (63275656).

Almost surely, 2^126551311 is an apocalyptic number.

126551311 is a deficient number, since it is larger than the sum of its proper divisors (1).

126551311 is an equidigital number, since it uses as much as digits as its factorization.

126551311 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 900, while the sum is 25.

The square root of 126551311 is about 11249.5027001197. The cubic root of 126551311 is about 502.0599165004.

The spelling of 126551311 in words is "one hundred twenty-six million, five hundred fifty-one thousand, three hundred eleven".