137875281 has 4 divisors (see below), whose sum is σ = 183833712. Its totient is φ = 91916852.

The previous prime is 137875279. The next prime is 137875289. The reversal of 137875281 is 182578731.

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 137875281 - 2¹ = 137875279 is a prime.

It is a super-2 number, since 2×137875281² = 38019186221657922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (137875289) 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, 22979211 + ... + 22979216.

It is an arithmetic number, because the mean of its divisors is an integer number (45958428).

Almost surely, 2^137875281 is an apocalyptic number.

It is an amenable number.

137875281 is a deficient number, since it is larger than the sum of its proper divisors (45958431).

137875281 is an equidigital number, since it uses as much as digits as its factorization.

137875281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45958430.

The product of its digits is 94080, while the sum is 42.

The square root of 137875281 is about 11742.0305313860. The cubic root of 137875281 is about 516.6092010084.

The spelling of 137875281 in words is "one hundred thirty-seven million, eight hundred seventy-five thousand, two hundred eighty-one".