137534257 has 4 divisors (see below), whose sum is σ = 157182016. Its totient is φ = 117886500.

The previous prime is 137534239. The next prime is 137534357. The reversal of 137534257 is 752435731.

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 137534257 - 2¹⁵ = 137501489 is a prime.

It is the 11728-th Hogben number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (137534057) by changing a digit.

It is a nontrivial repunit in base 11727.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9823869 + ... + 9823882.

It is an arithmetic number, because the mean of its divisors is an integer number (39295504).

Almost surely, 2^137534257 is an apocalyptic number.

It is an amenable number.

137534257 is a deficient number, since it is larger than the sum of its proper divisors (19647759).

137534257 is an equidigital number, since it uses as much as digits as its factorization.

137534257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19647758.

The product of its digits is 88200, while the sum is 37.

The square root of 137534257 is about 11727.5000319761. The cubic root of 137534257 is about 516.1829181931.

Adding to 137534257 its reverse (752435731), we get a palindrome (889969988).

The spelling of 137534257 in words is "one hundred thirty-seven million, five hundred thirty-four thousand, two hundred fifty-seven".