126023557 has 6 divisors (see below), whose sum is σ = 138521894. Its totient is φ = 114566760.

The previous prime is 126023539. The next prime is 126023563. The reversal of 126023557 is 755320621.

It can be written as a sum of positive squares in only one way, i.e., 103754596 + 22268961 = 10186^2 + 4719^2 .

It is a de Polignac number, because none of the positive numbers 2^k-126023557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126023537) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 520638 + ... + 520879.

Almost surely, 2^126023557 is an apocalyptic number.

It is an amenable number.

126023557 is a deficient number, since it is larger than the sum of its proper divisors (12498337).

126023557 is a wasteful number, since it uses less digits than its factorization.

126023557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1041539 (or 1041528 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 31.

The square root of 126023557 is about 11226.0214234608. The cubic root of 126023557 is about 501.3610344754.

The spelling of 126023557 in words is "one hundred twenty-six million, twenty-three thousand, five hundred fifty-seven".