2293721 has 8 divisors (see below), whose sum is σ = 2471424. Its totient is φ = 2122560.

The previous prime is 2293703. The next prime is 2293723. The reversal of 2293721 is 1273922.

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

It is a cyclic number.

It is not a de Polignac number, because 2293721 - 2¹⁸ = 2031577 is a prime.

It is a super-2 number, since 2×2293721² = 10522312051682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2293723) 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, 896 + ... + 2321.

It is an arithmetic number, because the mean of its divisors is an integer number (308928).

2^2293721 is an apocalyptic number.

It is an amenable number.

2293721 is a deficient number, since it is larger than the sum of its proper divisors (177703).

2293721 is a wasteful number, since it uses less digits than its factorization.

2293721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3271.

The product of its digits is 1512, while the sum is 26.

The square root of 2293721 is about 1514.5035490219. The cubic root of 2293721 is about 131.8803821467.

The spelling of 2293721 in words is "two million, two hundred ninety-three thousand, seven hundred twenty-one".