2373721 has 4 divisors (see below), whose sum is σ = 2712832. Its totient is φ = 2034612.

The previous prime is 2373697. The next prime is 2373731. The reversal of 2373721 is 1273732.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2373721 - 2¹¹ = 2371673 is a prime.

It is a d-powerful number, because it can be written as 2⁷ + 3⁹ + 7⁶ + 3¹³ + 7⁶ + 2¹⁹ + 1 .

It is a Duffinian number.

2373721 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2373731) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 169545 + ... + 169558.

It is an arithmetic number, because the mean of its divisors is an integer number (678208).

2^2373721 is an apocalyptic number.

It is an amenable number.

2373721 is a deficient number, since it is larger than the sum of its proper divisors (339111).

2373721 is an equidigital number, since it uses as much as digits as its factorization.

2373721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339110.

The product of its digits is 1764, while the sum is 25.

The square root of 2373721 is about 1540.6884824649. The cubic root of 2373721 is about 133.3961280604.

The spelling of 2373721 in words is "two million, three hundred seventy-three thousand, seven hundred twenty-one".