137520505 has 8 divisors (see below), whose sum is σ = 165169224. Its totient is φ = 109920000.

The previous prime is 137520503. The next prime is 137520511. The reversal of 137520505 is 505025731.

It can be written as a sum of positive squares in 4 ways, for example, as 10214416 + 127306089 = 3196^2 + 11283^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 137520505 - 2¹ = 137520503 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (137520503) 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 7 ways as a sum of consecutive naturals, for example, 5446 + ... + 17455.

It is an arithmetic number, because the mean of its divisors is an integer number (20646153).

Almost surely, 2^137520505 is an apocalyptic number.

It is an amenable number.

137520505 is a deficient number, since it is larger than the sum of its proper divisors (27648719).

137520505 is a wasteful number, since it uses less digits than its factorization.

137520505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24107.

The product of its (nonzero) digits is 5250, while the sum is 28.

The square root of 137520505 is about 11726.9137031019. The cubic root of 137520505 is about 516.1657133060.

The spelling of 137520505 in words is "one hundred thirty-seven million, five hundred twenty thousand, five hundred five".