137652521 has 2 divisors, whose sum is σ = 137652522. Its totient is φ = 137652520.

The previous prime is 137652517. The next prime is 137652533. The reversal of 137652521 is 125256731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 90935296 + 46717225 = 9536^2 + 6835^2 .

It is a cyclic number.

It is not a de Polignac number, because 137652521 - 2² = 137652517 is a prime.

It is not a weakly prime, because it can be changed into another prime (137652551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68826260 + 68826261.

It is an arithmetic number, because the mean of its divisors is an integer number (68826261).

Almost surely, 2^137652521 is an apocalyptic number.

It is an amenable number.

137652521 is a deficient number, since it is larger than the sum of its proper divisors (1).

137652521 is an equidigital number, since it uses as much as digits as its factorization.

137652521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12600, while the sum is 32.

The square root of 137652521 is about 11732.5411143537. The cubic root of 137652521 is about 516.3308288998.

The spelling of 137652521 in words is "one hundred thirty-seven million, six hundred fifty-two thousand, five hundred twenty-one".