2290621 has 8 divisors (see below), whose sum is σ = 2489600. Its totient is φ = 2099520.

The previous prime is 2290619. The next prime is 2290627. The reversal of 2290621 is 1260922.

It is a happy number.

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

It is a 8-Lehmer number, since φ(2290621) divides (2290621-1)⁸.

It is a cyclic number.

It is not a de Polignac number, because 2290621 - 2¹ = 2290619 is a prime.

It is a Duffinian number.

2290621 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 2290592 and 2290601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2290627) 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, 1356 + ... + 2533.

It is an arithmetic number, because the mean of its divisors is an integer number (311200).

2^2290621 is an apocalyptic number.

It is an amenable number.

2290621 is a deficient number, since it is larger than the sum of its proper divisors (198979).

2290621 is a wasteful number, since it uses less digits than its factorization.

2290621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3939.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 2290621 is about 1513.4797653091. The cubic root of 2290621 is about 131.8209425574.

The spelling of 2290621 in words is "two million, two hundred ninety thousand, six hundred twenty-one".