131072257 has 4 divisors (see below), whose sum is σ = 135592020. Its totient is φ = 126552496.

The previous prime is 131072251. The next prime is 131072281. The reversal of 131072257 is 752270131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 752270131 = 23 ⋅32707397.

It can be written as a sum of positive squares in 2 ways, for example, as 61449921 + 69622336 = 7839^2 + 8344^2 .

It is a cyclic number.

It is not a de Polignac number, because 131072257 - 2¹¹ = 131070209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131072251) 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, 2259838 + ... + 2259895.

It is an arithmetic number, because the mean of its divisors is an integer number (33898005).

Almost surely, 2^131072257 is an apocalyptic number.

It is an amenable number.

131072257 is a deficient number, since it is larger than the sum of its proper divisors (4519763).

131072257 is an equidigital number, since it uses as much as digits as its factorization.

131072257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4519762.

The product of its (nonzero) digits is 2940, while the sum is 28.

The square root of 131072257 is about 11448.6792688065. The cubic root of 131072257 is about 507.9686686300.

The spelling of 131072257 in words is "one hundred thirty-one million, seventy-two thousand, two hundred fifty-seven".