126380921 has 2 divisors, whose sum is σ = 126380922. Its totient is φ = 126380920.

The previous prime is 126380911. The next prime is 126380939. The reversal of 126380921 is 129083621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 126247696 + 133225 = 11236^2 + 365^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126380921 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (126380911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63190460 + 63190461.

It is an arithmetic number, because the mean of its divisors is an integer number (63190461).

Almost surely, 2^126380921 is an apocalyptic number.

It is an amenable number.

126380921 is a deficient number, since it is larger than the sum of its proper divisors (1).

126380921 is an equidigital number, since it uses as much as digits as its factorization.

126380921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 126380921 is about 11241.9269255764. The cubic root of 126380921 is about 501.8344890681.

The spelling of 126380921 in words is "one hundred twenty-six million, three hundred eighty thousand, nine hundred twenty-one".