137445 has 48 divisors (see below), whose sum is σ = 295488. Its totient is φ = 53760.

The previous prime is 137443. The next prime is 137447. The reversal of 137445 is 544731.

It is an interprime number because it is at equal distance from previous prime (137443) and next prime (137447).

It is not a de Polignac number, because 137445 - 2¹ = 137443 is a prime.

It is a super-2 number, since 2×137445² = 37782256050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137443) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8077 + ... + 8093.

It is an arithmetic number, because the mean of its divisors is an integer number (6156).

2¹³⁷⁴⁴⁵ is an apocalyptic number.

137445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

137445 is an abundant number, since it is smaller than the sum of its proper divisors (158043).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

137445 is a wasteful number, since it uses less digits than its factorization.

137445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50 (or 43 counting only the distinct ones).

The product of its digits is 1680, while the sum is 24.

The square root of 137445 is about 370.7357549522. The cubic root of 137445 is about 51.6071229876.

The spelling of 137445 in words is "one hundred thirty-seven thousand, four hundred forty-five".