2992721 has 8 divisors (see below), whose sum is σ = 3089088. Its totient is φ = 2898000.

The previous prime is 2992711. The next prime is 2992723. The reversal of 2992721 is 1272992.

2992721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 2992721 - 2¹⁸ = 2730577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2992723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3986 + ... + 4676.

It is an arithmetic number, because the mean of its divisors is an integer number (386136).

2^2992721 is an apocalyptic number.

It is an amenable number.

2992721 is a deficient number, since it is larger than the sum of its proper divisors (96367).

2992721 is an equidigital number, since it uses as much as digits as its factorization.

2992721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 823.

The product of its digits is 4536, while the sum is 32.

The square root of 2992721 is about 1729.9482651224. The cubic root of 2992721 is about 144.1082166225.

The spelling of 2992721 in words is "two million, nine hundred ninety-two thousand, seven hundred twenty-one".