2366721 has 12 divisors (see below), whose sum is σ = 3907072. Its totient is φ = 1352376.

The previous prime is 2366711. The next prime is 2366731. The reversal of 2366721 is 1276632.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2366711) and next prime (2366731).

It is not a de Polignac number, because 2366721 - 2⁶ = 2366657 is a prime.

It is a d-powerful number, because it can be written as 2³ + 3¹² + 6⁵ + 6⁸ + 7⁵ + 2¹⁷ + 1 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2366701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18721 + ... + 18846.

2^2366721 is an apocalyptic number.

2366721 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2366721 is a deficient number, since it is larger than the sum of its proper divisors (1540351).

2366721 is a wasteful number, since it uses less digits than its factorization.

2366721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37580 (or 37577 counting only the distinct ones).

The product of its digits is 3024, while the sum is 27.

The square root of 2366721 is about 1538.4150935297. The cubic root of 2366721 is about 133.2648724933.

The spelling of 2366721 in words is "two million, three hundred sixty-six thousand, seven hundred twenty-one".