2367721 has 2 divisors, whose sum is σ = 2367722. Its totient is φ = 2367720.

The previous prime is 2367707. The next prime is 2367731. The reversal of 2367721 is 1277632.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1345600 + 1022121 = 1160^2 + 1011^2 .

It is a cyclic number.

It is not a de Polignac number, because 2367721 - 2¹⁵ = 2334953 is a prime.

It is a super-2 number, since 2×2367721² = 11212205467682, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2367721.

It is not a weakly prime, because it can be changed into another prime (2367731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1183860 + 1183861.

It is an arithmetic number, because the mean of its divisors is an integer number (1183861).

2^2367721 is an apocalyptic number.

It is an amenable number.

2367721 is a deficient number, since it is larger than the sum of its proper divisors (1).

2367721 is an equidigital number, since it uses as much as digits as its factorization.

2367721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3528, while the sum is 28.

The square root of 2367721 is about 1538.7400690175. The cubic root of 2367721 is about 133.2836391198.

The spelling of 2367721 in words is "two million, three hundred sixty-seven thousand, seven hundred twenty-one".