137892561 has 8 divisors (see below), whose sum is σ = 184146144. Its totient is φ = 91783680.

The previous prime is 137892541. The next prime is 137892569. The reversal of 137892561 is 165298731.

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

It is not a de Polignac number, because 137892561 - 2¹⁴ = 137876177 is a prime.

It is not an unprimeable number, because it can be changed into a prime (137892569) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33931 + ... + 37776.

It is an arithmetic number, because the mean of its divisors is an integer number (23018268).

Almost surely, 2^137892561 is an apocalyptic number.

It is an amenable number.

137892561 is a deficient number, since it is larger than the sum of its proper divisors (46253583).

137892561 is an equidigital number, since it uses as much as digits as its factorization.

137892561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72351.

The product of its digits is 90720, while the sum is 42.

The square root of 137892561 is about 11742.7663265518. The cubic root of 137892561 is about 516.6307824309.

It can be divided in two parts, 1378 and 92561, that added together give a palindrome (93939).

The spelling of 137892561 in words is "one hundred thirty-seven million, eight hundred ninety-two thousand, five hundred sixty-one".