3407721 has 8 divisors (see below), whose sum is σ = 4595040. Its totient is φ = 2246112.

The previous prime is 3407693. The next prime is 3407743. The reversal of 3407721 is 1277043.

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

It is not a de Polignac number, because 3407721 - 2¹⁸ = 3145577 is a prime.

It is a super-2 number, since 2×3407721² = 23225124827682, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3407691 and 3407700.

It is not an unprimeable number, because it can be changed into a prime (3407771) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6115 + ... + 6648.

It is an arithmetic number, because the mean of its divisors is an integer number (574380).

Almost surely, 2^3407721 is an apocalyptic number.

It is an amenable number.

3407721 is a deficient number, since it is larger than the sum of its proper divisors (1187319).

3407721 is a wasteful number, since it uses less digits than its factorization.

3407721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12855.

The product of its (nonzero) digits is 1176, while the sum is 24.

The square root of 3407721 is about 1846.0013542790. The cubic root of 3407721 is about 150.4831973530.

The spelling of 3407721 in words is "three million, four hundred seven thousand, seven hundred twenty-one".