137245 has 4 divisors (see below), whose sum is σ = 164700. Its totient is φ = 109792.

The previous prime is 137239. The next prime is 137251. The reversal of 137245 is 542731.

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

It is an interprime number because it is at equal distance from previous prime (137239) and next prime (137251).

It can be written as a sum of positive squares in 2 ways, for example, as 76729 + 60516 = 277^2 + 246^2 .

It is a cyclic number.

It is not a de Polignac number, because 137245 - 2⁷ = 137117 is a prime.

137245 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13720 + ... + 13729.

It is an arithmetic number, because the mean of its divisors is an integer number (41175).

2¹³⁷²⁴⁵ is an apocalyptic number.

It is an amenable number.

137245 is a deficient number, since it is larger than the sum of its proper divisors (27455).

137245 is an equidigital number, since it uses as much as digits as its factorization.

137245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27454.

The product of its digits is 840, while the sum is 22.

The square root of 137245 is about 370.4659228593. The cubic root of 137245 is about 51.5820791883.

Adding to 137245 its reverse (542731), we get a palindrome (679976).

The spelling of 137245 in words is "one hundred thirty-seven thousand, two hundred forty-five".