137464561 has 4 divisors (see below), whose sum is σ = 148038772. Its totient is φ = 126890352.

The previous prime is 137464549. The next prime is 137464573. The reversal of 137464561 is 165464731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 165464731 = 43 ⋅3848017.

It is an interprime number because it is at equal distance from previous prime (137464549) and next prime (137464573).

It can be written as a sum of positive squares in 2 ways, for example, as 17430625 + 120033936 = 4175^2 + 10956^2 .

It is a cyclic number.

It is not a de Polignac number, because 137464561 - 2⁵ = 137464529 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 137464561.

It is not an unprimeable number, because it can be changed into a prime (137464501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5287086 + ... + 5287111.

It is an arithmetic number, because the mean of its divisors is an integer number (37009693).

Almost surely, 2^137464561 is an apocalyptic number.

It is an amenable number.

137464561 is a deficient number, since it is larger than the sum of its proper divisors (10574211).

137464561 is a wasteful number, since it uses less digits than its factorization.

137464561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10574210.

The product of its digits is 60480, while the sum is 37.

The square root of 137464561 is about 11724.5281781400. The cubic root of 137464561 is about 516.0957109180.

The spelling of 137464561 in words is "one hundred thirty-seven million, four hundred sixty-four thousand, five hundred sixty-one".