137643025 has 24 divisors (see below), whose sum is σ = 187737984. Its totient is φ = 99470400.

The previous prime is 137643001. The next prime is 137643029. The reversal of 137643025 is 520346731.

It is not a de Polignac number, because 137643025 - 2²⁷ = 3425297 is a prime.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (137643029) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10770 + ... + 19780.

It is an arithmetic number, because the mean of its divisors is an integer number (7822416).

Almost surely, 2^137643025 is an apocalyptic number.

It is an amenable number.

137643025 is a deficient number, since it is larger than the sum of its proper divisors (50094959).

137643025 is a wasteful number, since it uses less digits than its factorization.

137643025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9081 (or 9076 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 31.

The square root of 137643025 is about 11732.1364209593. The cubic root of 137643025 is about 516.3189555483.

Adding to 137643025 its reverse (520346731), we get a palindrome (657989756).

The spelling of 137643025 in words is "one hundred thirty-seven million, six hundred forty-three thousand, twenty-five".