137520761 has 4 divisors (see below), whose sum is σ = 157166592. Its totient is φ = 117874932.

The previous prime is 137520739. The next prime is 137520763. The reversal of 137520761 is 167025731.

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 not a de Polignac number, because 137520761 - 2²⁶ = 70411897 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (137520763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9822905 + ... + 9822918.

It is an arithmetic number, because the mean of its divisors is an integer number (39291648).

Almost surely, 2^137520761 is an apocalyptic number.

It is an amenable number.

137520761 is a deficient number, since it is larger than the sum of its proper divisors (19645831).

137520761 is an equidigital number, since it uses as much as digits as its factorization.

137520761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19645830.

The product of its (nonzero) digits is 8820, while the sum is 32.

The square root of 137520761 is about 11726.9246181597. The cubic root of 137520761 is about 516.1660335936.

The spelling of 137520761 in words is "one hundred thirty-seven million, five hundred twenty thousand, seven hundred sixty-one".