126263657 has 4 divisors (see below), whose sum is σ = 135976260. Its totient is φ = 116551056.

The previous prime is 126263653. The next prime is 126263681. The reversal of 126263657 is 756362621.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 70073641 + 56190016 = 8371^2 + 7496^2 .

It is a cyclic number.

It is not a de Polignac number, because 126263657 - 2² = 126263653 is a prime.

It is a super-2 number, since 2×126263657² = 31885022158027298, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 126263657.

It is not an unprimeable number, because it can be changed into a prime (126263653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4856282 + ... + 4856307.

It is an arithmetic number, because the mean of its divisors is an integer number (33994065).

Almost surely, 2^126263657 is an apocalyptic number.

It is an amenable number.

126263657 is a deficient number, since it is larger than the sum of its proper divisors (9712603).

126263657 is an equidigital number, since it uses as much as digits as its factorization.

126263657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9712602.

The product of its digits is 90720, while the sum is 38.

The square root of 126263657 is about 11236.7102392115. The cubic root of 126263657 is about 501.6792300593.

The spelling of 126263657 in words is "one hundred twenty-six million, two hundred sixty-three thousand, six hundred fifty-seven".