126432557 has 8 divisors (see below), whose sum is σ = 127370880. Its totient is φ = 125498080.

The previous prime is 126432521. The next prime is 126432577. The reversal of 126432557 is 755234621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 126432557 - 2²⁴ = 109655341 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 (126432577) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99794 + ... + 101052.

It is an arithmetic number, because the mean of its divisors is an integer number (15921360).

Almost surely, 2^126432557 is an apocalyptic number.

It is an amenable number.

126432557 is a deficient number, since it is larger than the sum of its proper divisors (938323).

126432557 is a wasteful number, since it uses less digits than its factorization.

126432557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1923.

The product of its digits is 50400, while the sum is 35.

The square root of 126432557 is about 11244.2232724186. The cubic root of 126432557 is about 501.9028253254.

The spelling of 126432557 in words is "one hundred twenty-six million, four hundred thirty-two thousand, five hundred fifty-seven".