137021273 has 8 divisors (see below), whose sum is σ = 137983560. Its totient is φ = 136062720.

The previous prime is 137021237. The next prime is 137021321. The reversal of 137021273 is 372120731.

It can be written as a sum of positive squares in 4 ways, for example, as 21501769 + 115519504 = 4637^2 + 10748^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-137021273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (137021233) 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, 122111 + ... + 123227.

It is an arithmetic number, because the mean of its divisors is an integer number (17247945).

Almost surely, 2^137021273 is an apocalyptic number.

It is an amenable number.

137021273 is a deficient number, since it is larger than the sum of its proper divisors (962287).

137021273 is a wasteful number, since it uses less digits than its factorization.

137021273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1867.

The product of its (nonzero) digits is 1764, while the sum is 26.

The square root of 137021273 is about 11705.6086129684. The cubic root of 137021273 is about 515.5403547028.

The spelling of 137021273 in words is "one hundred thirty-seven million, twenty-one thousand, two hundred seventy-three".