158557457 has 4 divisors (see below), whose sum is σ = 159256176. Its totient is φ = 157858740.

The previous prime is 158557447. The next prime is 158557463. The reversal of 158557457 is 754755851.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 158557457 - 2⁶ = 158557393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (158557417) 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, 349019 + ... + 349472.

It is an arithmetic number, because the mean of its divisors is an integer number (39814044).

Almost surely, 2^158557457 is an apocalyptic number.

It is an amenable number.

158557457 is a deficient number, since it is larger than the sum of its proper divisors (698719).

158557457 is an equidigital number, since it uses as much as digits as its factorization.

158557457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 698718.

The product of its digits is 980000, while the sum is 47.

The square root of 158557457 is about 12591.9600142313. The cubic root of 158557457 is about 541.2470686655.

The spelling of 158557457 in words is "one hundred fifty-eight million, five hundred fifty-seven thousand, four hundred fifty-seven".