137325021 has 4 divisors (see below), whose sum is σ = 183100032. Its totient is φ = 91550012.

The previous prime is 137325017. The next prime is 137325049. The reversal of 137325021 is 120523731.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 137325021 - 2² = 137325017 is a prime.

It is a super-3 number, since 3×137325021³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 137324982 and 137325000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137325061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22887501 + ... + 22887506.

It is an arithmetic number, because the mean of its divisors is an integer number (45775008).

Almost surely, 2^137325021 is an apocalyptic number.

It is an amenable number.

137325021 is a deficient number, since it is larger than the sum of its proper divisors (45775011).

137325021 is an equidigital number, since it uses as much as digits as its factorization.

137325021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45775010.

The product of its (nonzero) digits is 1260, while the sum is 24.

The square root of 137325021 is about 11718.5758947067. The cubic root of 137325021 is about 515.9210225559.

Adding to 137325021 its reverse (120523731), we get a palindrome (257848752).

The spelling of 137325021 in words is "one hundred thirty-seven million, three hundred twenty-five thousand, twenty-one".