137940245 has 8 divisors (see below), whose sum is σ = 167167800. Its totient is φ = 109259200.

The previous prime is 137940239. The next prime is 137940251. The reversal of 137940245 is 542049731.

It is an interprime number because it is at equal distance from previous prime (137940239) and next prime (137940251).

It can be written as a sum of positive squares in 4 ways, for example, as 41075281 + 96864964 = 6409^2 + 9842^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 137940245 - 2²⁶ = 70831381 is a prime.

It is a super-2 number, since 2×137940245² = 38055022381320050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 136070 + ... + 137079.

It is an arithmetic number, because the mean of its divisors is an integer number (20895975).

Almost surely, 2^137940245 is an apocalyptic number.

It is an amenable number.

137940245 is a deficient number, since it is larger than the sum of its proper divisors (29227555).

137940245 is a wasteful number, since it uses less digits than its factorization.

137940245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273255.

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 137940245 is about 11744.7965073900. The cubic root of 137940245 is about 516.6903268157.

Adding to 137940245 its reverse (542049731), we get a palindrome (679989976).

The spelling of 137940245 in words is "one hundred thirty-seven million, nine hundred forty thousand, two hundred forty-five".