137442557 has 4 divisors (see below), whose sum is σ = 157077216. Its totient is φ = 117807900.

The previous prime is 137442551. The next prime is 137442587. The reversal of 137442557 is 755244731.

137442557 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also an emirpimes, since its reverse is a distinct semiprime: 755244731 = 2477 ⋅304903.

It is not a de Polignac number, because 137442557 - 2⁶ = 137442493 is a prime.

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 137442557.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137442551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9817319 + ... + 9817332.

It is an arithmetic number, because the mean of its divisors is an integer number (39269304).

Almost surely, 2^137442557 is an apocalyptic number.

It is an amenable number.

137442557 is a deficient number, since it is larger than the sum of its proper divisors (19634659).

137442557 is an equidigital number, since it uses as much as digits as its factorization.

137442557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19634658.

The product of its digits is 117600, while the sum is 38.

The square root of 137442557 is about 11723.5897659377. The cubic root of 137442557 is about 516.0681722420.

The spelling of 137442557 in words is "one hundred thirty-seven million, four hundred forty-two thousand, five hundred fifty-seven".