3721857 has 8 divisors (see below), whose sum is σ = 5083680. Its totient is φ = 2420640.

The previous prime is 3721849. The next prime is 3721859. The reversal of 3721857 is 7581273.

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

It is not a de Polignac number, because 3721857 - 2³ = 3721849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3721859) 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, 15007 + ... + 15252.

It is an arithmetic number, because the mean of its divisors is an integer number (635460).

Almost surely, 2^3721857 is an apocalyptic number.

It is an amenable number.

3721857 is a deficient number, since it is larger than the sum of its proper divisors (1361823).

3721857 is a wasteful number, since it uses less digits than its factorization.

3721857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30303.

The product of its digits is 11760, while the sum is 33.

The square root of 3721857 is about 1929.2114969593. The cubic root of 3721857 is about 154.9719963284.

The spelling of 3721857 in words is "three million, seven hundred twenty-one thousand, eight hundred fifty-seven".