126672391 has 2 divisors, whose sum is σ = 126672392. Its totient is φ = 126672390.

The previous prime is 126672361. The next prime is 126672401. The reversal of 126672391 is 193276621.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 126672391 - 2⁷ = 126672263 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 126672391.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126672311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63336195 + 63336196.

It is an arithmetic number, because the mean of its divisors is an integer number (63336196).

Almost surely, 2^126672391 is an apocalyptic number.

126672391 is a deficient number, since it is larger than the sum of its proper divisors (1).

126672391 is an equidigital number, since it uses as much as digits as its factorization.

126672391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27216, while the sum is 37.

The square root of 126672391 is about 11254.8829847316. The cubic root of 126672391 is about 502.2199834261.

The spelling of 126672391 in words is "one hundred twenty-six million, six hundred seventy-two thousand, three hundred ninety-one".