3135921 has 4 divisors (see below), whose sum is σ = 4181232. Its totient is φ = 2090612.

The previous prime is 3135883. The next prime is 3135943. The reversal of 3135921 is 1295313.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3135921 - 2⁹ = 3135409 is a prime.

It is a D-number.

It is a junction number, because it is equal to n+sod(n) for n = 3135891 and 3135900.

It is not an unprimeable number, because it can be changed into a prime (3135961) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 522651 + ... + 522656.

It is an arithmetic number, because the mean of its divisors is an integer number (1045308).

Almost surely, 2^3135921 is an apocalyptic number.

It is an amenable number.

3135921 is a deficient number, since it is larger than the sum of its proper divisors (1045311).

3135921 is a wasteful number, since it uses less digits than its factorization.

3135921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1045310.

The product of its digits is 810, while the sum is 24.

The square root of 3135921 is about 1770.8531842025. The cubic root of 3135921 is about 146.3709992871.

The spelling of 3135921 in words is "three million, one hundred thirty-five thousand, nine hundred twenty-one".