2356721 has 8 divisors (see below), whose sum is σ = 2467584. Its totient is φ = 2248480.

The previous prime is 2356699. The next prime is 2356763. The reversal of 2356721 is 1276532.

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

It is not a de Polignac number, because 2356721 - 2¹⁰ = 2355697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2356771) 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, 1316 + ... + 2538.

It is an arithmetic number, because the mean of its divisors is an integer number (308448).

2^2356721 is an apocalyptic number.

It is an amenable number.

2356721 is a deficient number, since it is larger than the sum of its proper divisors (110863).

2356721 is a wasteful number, since it uses less digits than its factorization.

2356721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1311.

The product of its digits is 2520, while the sum is 26.

The square root of 2356721 is about 1535.1615550163. The cubic root of 2356721 is about 133.0769148266.

The spelling of 2356721 in words is "two million, three hundred fifty-six thousand, seven hundred twenty-one".