2237721 has 8 divisors (see below), whose sum is σ = 3003264. Its totient is φ = 1482000.

The previous prime is 2237701. The next prime is 2237743. The reversal of 2237721 is 1277322.

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

It is not a de Polignac number, because 2237721 - 2⁵ = 2237689 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2237691 and 2237700.

It is not an unprimeable number, because it can be changed into a prime (2237701) 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, 1905 + ... + 2846.

It is an arithmetic number, because the mean of its divisors is an integer number (375408).

2^2237721 is an apocalyptic number.

It is an amenable number.

2237721 is a deficient number, since it is larger than the sum of its proper divisors (765543).

2237721 is a wasteful number, since it uses less digits than its factorization.

2237721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4911.

The product of its digits is 1176, while the sum is 24.

The square root of 2237721 is about 1495.9014004940. The cubic root of 2237721 is about 130.7982637782.

The spelling of 2237721 in words is "two million, two hundred thirty-seven thousand, seven hundred twenty-one".