126727421 has 2 divisors, whose sum is σ = 126727422. Its totient is φ = 126727420.

The previous prime is 126727387. The next prime is 126727441. The reversal of 126727421 is 124727621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 111408025 + 15319396 = 10555^2 + 3914^2 .

It is a cyclic number.

It is not a de Polignac number, because 126727421 - 2⁶ = 126727357 is a prime.

It is a super-2 number, since 2×126727421² = 32119678466622482, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126727441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63363710 + 63363711.

It is an arithmetic number, because the mean of its divisors is an integer number (63363711).

Almost surely, 2^126727421 is an apocalyptic number.

It is an amenable number.

126727421 is a deficient number, since it is larger than the sum of its proper divisors (1).

126727421 is an equidigital number, since it uses as much as digits as its factorization.

126727421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9408, while the sum is 32.

The square root of 126727421 is about 11257.3274359414. The cubic root of 126727421 is about 502.2926989940.

The spelling of 126727421 in words is "one hundred twenty-six million, seven hundred twenty-seven thousand, four hundred twenty-one".