2265621 has 8 divisors (see below), whose sum is σ = 3102624. Its totient is φ = 1469520.

The previous prime is 2265611. The next prime is 2265623. The reversal of 2265621 is 1265622.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2265621 - 2⁵ = 2265589 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2265591 and 2265600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2265623) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10095 + ... + 10316.

It is an arithmetic number, because the mean of its divisors is an integer number (387828).

2^2265621 is an apocalyptic number.

It is an amenable number.

2265621 is a deficient number, since it is larger than the sum of its proper divisors (837003).

2265621 is a wasteful number, since it uses less digits than its factorization.

2265621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20451.

The product of its digits is 1440, while the sum is 24.

The square root of 2265621 is about 1505.1979936208. The cubic root of 2265621 is about 131.3396195181.

Subtracting from 2265621 its reverse (1265622), we obtain a palindrome (999999).

The spelling of 2265621 in words is "two million, two hundred sixty-five thousand, six hundred twenty-one".