137642 has 4 divisors (see below), whose sum is σ = 206466. Its totient is φ = 68820.

The previous prime is 137639. The next prime is 137653. The reversal of 137642 is 246731.

It is a Cunningham number, because it is equal to 371²+1.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 137641 + 1 = 371^2 + 1^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34409 + ... + 34412.

137642 is a Friedman number, since it can be written as (364+7)^2+1, using all its digits and the basic arithmetic operations.

2¹³⁷⁶⁴² is an apocalyptic number.

137642 is a deficient number, since it is larger than the sum of its proper divisors (68824).

137642 is an equidigital number, since it uses as much as digits as its factorization.

137642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68823.

The product of its digits is 1008, while the sum is 23.

The square root of 137642 is about 371.0013477064. The cubic root of 137642 is about 51.6317673904.

The spelling of 137642 in words is "one hundred thirty-seven thousand, six hundred forty-two".