2275921 has 4 divisors (see below), whose sum is σ = 2307172. Its totient is φ = 2244672.

The previous prime is 2275913. The next prime is 2275937. The reversal of 2275921 is 1295722.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1295722 = 2 ⋅647861.

It can be written as a sum of positive squares in 2 ways, for example, as 1527696 + 748225 = 1236^2 + 865^2 .

It is a cyclic number.

It is not a de Polignac number, because 2275921 - 2³ = 2275913 is a prime.

It is a Duffinian number.

2275921 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 2275921.

It is not an unprimeable number, because it can be changed into a prime (2275961) 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, 15516 + ... + 15661.

It is an arithmetic number, because the mean of its divisors is an integer number (576793).

2^2275921 is an apocalyptic number.

It is an amenable number.

2275921 is a deficient number, since it is larger than the sum of its proper divisors (31251).

2275921 is an equidigital number, since it uses as much as digits as its factorization.

2275921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31250.

The product of its digits is 2520, while the sum is 28.

The square root of 2275921 is about 1508.6155905333. The cubic root of 2275921 is about 131.5383513752.

The spelling of 2275921 in words is "two million, two hundred seventy-five thousand, nine hundred twenty-one".