2597921 has 4 divisors (see below), whose sum is σ = 2603952. Its totient is φ = 2591892.

The previous prime is 2597911. The next prime is 2597939. The reversal of 2597921 is 1297952.

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 2597921 - 2⁶ = 2597857 is a prime.

It is a d-powerful number, because it can be written as 2¹¹ + 5⁹ + 9² + 7⁶ + 9³ + 2¹⁹ + 1 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2597911) 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, 2315 + ... + 3248.

It is an arithmetic number, because the mean of its divisors is an integer number (650988).

2^2597921 is an apocalyptic number.

It is an amenable number.

2597921 is a deficient number, since it is larger than the sum of its proper divisors (6031).

2597921 is an equidigital number, since it uses as much as digits as its factorization.

2597921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6030.

The product of its digits is 11340, while the sum is 35.

The square root of 2597921 is about 1611.8067502030. The cubic root of 2597921 is about 137.4702260602.

The spelling of 2597921 in words is "two million, five hundred ninety-seven thousand, nine hundred twenty-one".