2521897 has 4 divisors (see below), whose sum is σ = 2882176. Its totient is φ = 2161620.

The previous prime is 2521847. The next prime is 2521901. The reversal of 2521897 is 7981252.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2521897 - 2⁷ = 2521769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2521807) 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, 180129 + ... + 180142.

It is an arithmetic number, because the mean of its divisors is an integer number (720544).

2^2521897 is an apocalyptic number.

It is an amenable number.

2521897 is a deficient number, since it is larger than the sum of its proper divisors (360279).

2521897 is an equidigital number, since it uses as much as digits as its factorization.

2521897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360278.

The product of its digits is 10080, while the sum is 34.

The square root of 2521897 is about 1588.0481730728. The cubic root of 2521897 is about 136.1159802167.

The spelling of 2521897 in words is "two million, five hundred twenty-one thousand, eight hundred ninety-seven".