2261643 has 8 divisors (see below), whose sum is σ = 3022656. Its totient is φ = 1504200.

The previous prime is 2261639. The next prime is 2261653. The reversal of 2261643 is 3461622.

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

It is not a de Polignac number, because 2261643 - 2² = 2261639 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2261603) 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, 1528 + ... + 2618.

It is an arithmetic number, because the mean of its divisors is an integer number (377832).

2^2261643 is an apocalyptic number.

2261643 is a deficient number, since it is larger than the sum of its proper divisors (761013).

2261643 is a wasteful number, since it uses less digits than its factorization.

2261643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1785.

The product of its digits is 1728, while the sum is 24.

The square root of 2261643 is about 1503.8759922281. The cubic root of 2261643 is about 131.2627053460.

The spelling of 2261643 in words is "two million, two hundred sixty-one thousand, six hundred forty-three".