126711961 has 2 divisors, whose sum is σ = 126711962. Its totient is φ = 126711960.

The previous prime is 126711943. The next prime is 126711967. The reversal of 126711961 is 169117621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83612736 + 43099225 = 9144^2 + 6565^2 .

It is an emirp because it is prime and its reverse (169117621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 126711961 - 2⁵ = 126711929 is a prime.

It is not a weakly prime, because it can be changed into another prime (126711967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63355980 + 63355981.

It is an arithmetic number, because the mean of its divisors is an integer number (63355981).

Almost surely, 2^126711961 is an apocalyptic number.

It is an amenable number.

126711961 is a deficient number, since it is larger than the sum of its proper divisors (1).

126711961 is an equidigital number, since it uses as much as digits as its factorization.

126711961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4536, while the sum is 34.

The square root of 126711961 is about 11256.6407511300. The cubic root of 126711961 is about 502.2722725783.

The spelling of 126711961 in words is "one hundred twenty-six million, seven hundred eleven thousand, nine hundred sixty-one".