126928961 has 2 divisors, whose sum is σ = 126928962. Its totient is φ = 126928960.

The previous prime is 126928957. The next prime is 126928979. The reversal of 126928961 is 169829621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 126337600 + 591361 = 11240^2 + 769^2 .

It is a cyclic number.

It is not a de Polignac number, because 126928961 - 2² = 126928957 is a prime.

It is a super-2 number, since 2×126928961² = 32221922281079042, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (126928951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63464480 + 63464481.

It is an arithmetic number, because the mean of its divisors is an integer number (63464481).

Almost surely, 2^126928961 is an apocalyptic number.

It is an amenable number.

126928961 is a deficient number, since it is larger than the sum of its proper divisors (1).

126928961 is an equidigital number, since it uses as much as digits as its factorization.

126928961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 93312, while the sum is 44.

The square root of 126928961 is about 11266.2753827518. The cubic root of 126928961 is about 502.5588304346.

The spelling of 126928961 in words is "one hundred twenty-six million, nine hundred twenty-eight thousand, nine hundred sixty-one".