3107721 has 8 divisors (see below), whose sum is σ = 4155840. Its totient is φ = 2065712.

The previous prime is 3107711. The next prime is 3107729. The reversal of 3107721 is 1277013.

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 3107721 - 2¹³ = 3099529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3107729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 165 + ... + 2498.

It is an arithmetic number, because the mean of its divisors is an integer number (519480).

Almost surely, 2^3107721 is an apocalyptic number.

It is an amenable number.

3107721 is a deficient number, since it is larger than the sum of its proper divisors (1048119).

3107721 is a wasteful number, since it uses less digits than its factorization.

3107721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3055.

The product of its (nonzero) digits is 294, while the sum is 21.

The square root of 3107721 is about 1762.8729392670. The cubic root of 3107721 is about 145.9309268560.

It can be divided in two parts, 3107 and 721, that added together give a triangular number (3828 = T₈₇).

The spelling of 3107721 in words is "three million, one hundred seven thousand, seven hundred twenty-one".