126451961 has 2 divisors, whose sum is σ = 126451962. Its totient is φ = 126451960.

The previous prime is 126451943. The next prime is 126452017. The reversal of 126451961 is 169154621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 126450025 + 1936 = 11245^2 + 44^2 .

It is an emirp because it is prime and its reverse (169154621) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126451961 is a prime.

It is not a weakly prime, because it can be changed into another prime (126451901) 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, 63225980 + 63225981.

It is an arithmetic number, because the mean of its divisors is an integer number (63225981).

Almost surely, 2^126451961 is an apocalyptic number.

It is an amenable number.

126451961 is a deficient number, since it is larger than the sum of its proper divisors (1).

126451961 is an equidigital number, since it uses as much as digits as its factorization.

126451961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12960, while the sum is 35.

The square root of 126451961 is about 11245.0860823739. The cubic root of 126451961 is about 501.9285002108.

The spelling of 126451961 in words is "one hundred twenty-six million, four hundred fifty-one thousand, nine hundred sixty-one".