126677021 has 2 divisors, whose sum is σ = 126677022. Its totient is φ = 126677020.

The previous prime is 126676981. The next prime is 126677027. The reversal of 126677021 is 120776621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 95160025 + 31516996 = 9755^2 + 5614^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126677021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126677027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63338510 + 63338511.

It is an arithmetic number, because the mean of its divisors is an integer number (63338511).

Almost surely, 2^126677021 is an apocalyptic number.

It is an amenable number.

126677021 is a deficient number, since it is larger than the sum of its proper divisors (1).

126677021 is an equidigital number, since it uses as much as digits as its factorization.

126677021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7056, while the sum is 32.

The square root of 126677021 is about 11255.0886713522. The cubic root of 126677021 is about 502.2261022290.

It can be divided in two parts, 1266 and 77021, that added together give a palindrome (78287).

The spelling of 126677021 in words is "one hundred twenty-six million, six hundred seventy-seven thousand, twenty-one".