2715257 has 4 divisors (see below), whose sum is σ = 2874996. Its totient is φ = 2555520.

The previous prime is 2715247. The next prime is 2715263. The reversal of 2715257 is 7525172.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1666681 + 1048576 = 1291^2 + 1024^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2715257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2715217) 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 3 ways as a sum of consecutive naturals, for example, 79844 + ... + 79877.

It is an arithmetic number, because the mean of its divisors is an integer number (718749).

2^2715257 is an apocalyptic number.

It is an amenable number.

2715257 is a deficient number, since it is larger than the sum of its proper divisors (159739).

2715257 is a wasteful number, since it uses less digits than its factorization.

2715257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159738.

The product of its digits is 4900, while the sum is 29.

The square root of 2715257 is about 1647.8036897640. The cubic root of 2715257 is about 139.5094566715.

The spelling of 2715257 in words is "two million, seven hundred fifteen thousand, two hundred fifty-seven".