126672401 has 2 divisors, whose sum is σ = 126672402. Its totient is φ = 126672400.

The previous prime is 126672391. The next prime is 126672409. The reversal of 126672401 is 104276621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 125462401 + 1210000 = 11201^2 + 1100^2 .

It is an emirp because it is prime and its reverse (104276621) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126672401 is a prime.

It is not a weakly prime, because it can be changed into another prime (126672409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63336200 + 63336201.

It is an arithmetic number, because the mean of its divisors is an integer number (63336201).

Almost surely, 2^126672401 is an apocalyptic number.

It is an amenable number.

126672401 is a deficient number, since it is larger than the sum of its proper divisors (1).

126672401 is an equidigital number, since it uses as much as digits as its factorization.

126672401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 126672401 is about 11254.8834289832. The cubic root of 126672401 is about 502.2199966418.

The spelling of 126672401 in words is "one hundred twenty-six million, six hundred seventy-two thousand, four hundred one".