126911251 has 2 divisors, whose sum is σ = 126911252. Its totient is φ = 126911250.

The previous prime is 126911231. The next prime is 126911261. The reversal of 126911251 is 152119621.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 126911251 - 2⁵ = 126911219 is a prime.

It is a super-2 number, since 2×126911251² = 32212931260770002, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (126911201) 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, 63455625 + 63455626.

It is an arithmetic number, because the mean of its divisors is an integer number (63455626).

Almost surely, 2^126911251 is an apocalyptic number.

126911251 is a deficient number, since it is larger than the sum of its proper divisors (1).

126911251 is an equidigital number, since it uses as much as digits as its factorization.

126911251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1080, while the sum is 28.

The square root of 126911251 is about 11265.4893812919. The cubic root of 126911251 is about 502.5354558615.

The spelling of 126911251 in words is "one hundred twenty-six million, nine hundred eleven thousand, two hundred fifty-one".