2245661 has 4 divisors (see below), whose sum is σ = 2449824. Its totient is φ = 2041500.

The previous prime is 2245657. The next prime is 2245679. The reversal of 2245661 is 1665422.

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 2245661 - 2² = 2245657 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2245661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2245631) 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, 102065 + ... + 102086.

It is an arithmetic number, because the mean of its divisors is an integer number (612456).

2^2245661 is an apocalyptic number.

It is an amenable number.

2245661 is a deficient number, since it is larger than the sum of its proper divisors (204163).

2245661 is a wasteful number, since it uses less digits than its factorization.

2245661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204162.

The product of its digits is 2880, while the sum is 26.

The square root of 2245661 is about 1498.5529687001. The cubic root of 2245661 is about 130.9527829367.

It can be divided in two parts, 224 and 5661, that added together give a palindrome (5885).

The spelling of 2245661 in words is "two million, two hundred forty-five thousand, six hundred sixty-one".