126297749 has 2 divisors, whose sum is σ = 126297750. Its totient is φ = 126297748.

The previous prime is 126297719. The next prime is 126297791. The reversal of 126297749 is 947792621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 102111025 + 24186724 = 10105^2 + 4918^2 .

It is a cyclic number.

It is not a de Polignac number, because 126297749 - 2²⁴ = 109520533 is a prime.

It is a super-2 number, since 2×126297749² = 31902242804934002, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126297719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63148874 + 63148875.

It is an arithmetic number, because the mean of its divisors is an integer number (63148875).

Almost surely, 2^126297749 is an apocalyptic number.

It is an amenable number.

126297749 is a deficient number, since it is larger than the sum of its proper divisors (1).

126297749 is an equidigital number, since it uses as much as digits as its factorization.

126297749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 381024, while the sum is 47.

The square root of 126297749 is about 11238.2271288669. The cubic root of 126297749 is about 501.7243782031.

The spelling of 126297749 in words is "one hundred twenty-six million, two hundred ninety-seven thousand, seven hundred forty-nine".