2390721 has 8 divisors (see below), whose sum is σ = 3207840. Its totient is φ = 1583712.

The previous prime is 2390711. The next prime is 2390723. The reversal of 2390721 is 1270932.

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

It is not a de Polignac number, because 2390721 - 2¹³ = 2382529 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2390691 and 2390700.

It is not an unprimeable number, because it can be changed into a prime (2390723) 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, 1956 + ... + 2933.

It is an arithmetic number, because the mean of its divisors is an integer number (400980).

2^2390721 is an apocalyptic number.

It is an amenable number.

2390721 is a deficient number, since it is larger than the sum of its proper divisors (817119).

2390721 is a wasteful number, since it uses less digits than its factorization.

2390721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5055.

The product of its (nonzero) digits is 756, while the sum is 24.

The square root of 2390721 is about 1546.1956538550. The cubic root of 2390721 is about 133.7138208256.

The spelling of 2390721 in words is "two million, three hundred ninety thousand, seven hundred twenty-one".