3921087 has 8 divisors (see below), whose sum is σ = 5503360. Its totient is φ = 2476440.

The previous prime is 3921079. The next prime is 3921089. The reversal of 3921087 is 7801293.

It is a happy number.

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

It is not a de Polignac number, because 3921087 - 2³ = 3921079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3921089) 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, 34339 + ... + 34452.

It is an arithmetic number, because the mean of its divisors is an integer number (687920).

Almost surely, 2^3921087 is an apocalyptic number.

3921087 is a deficient number, since it is larger than the sum of its proper divisors (1582273).

3921087 is a wasteful number, since it uses less digits than its factorization.

3921087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68813.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 3921087 is about 1980.1734772489. The cubic root of 3921087 is about 157.6892760991.

The spelling of 3921087 in words is "three million, nine hundred twenty-one thousand, eighty-seven".