126956981 has 2 divisors, whose sum is σ = 126956982. Its totient is φ = 126956980.

The previous prime is 126956959. The next prime is 126956989. The reversal of 126956981 is 189659621.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 126922756 + 34225 = 11266^2 + 185^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126956981 is a prime.

It is a super-2 number, since 2×126956981² = 32236150049268722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126956989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63478490 + 63478491.

It is an arithmetic number, because the mean of its divisors is an integer number (63478491).

Almost surely, 2^126956981 is an apocalyptic number.

It is an amenable number.

126956981 is a deficient number, since it is larger than the sum of its proper divisors (1).

126956981 is an equidigital number, since it uses as much as digits as its factorization.

126956981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 233280, while the sum is 47.

The square root of 126956981 is about 11267.5188484422. The cubic root of 126956981 is about 502.5958082377.

The spelling of 126956981 in words is "one hundred twenty-six million, nine hundred fifty-six thousand, nine hundred eighty-one".