3116421 has 32 divisors (see below), whose sum is σ = 5760000. Its totient is φ = 1617840.

The previous prime is 3116417. The next prime is 3116447. The reversal of 3116421 is 1246113.

It is a happy number.

It is not a de Polignac number, because 3116421 - 2² = 3116417 is a prime.

It is a Curzon number.

3116421 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 3116394 and 3116403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3116521) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1330 + ... + 2828.

It is an arithmetic number, because the mean of its divisors is an integer number (180000).

Almost surely, 2^3116421 is an apocalyptic number.

It is an amenable number.

3116421 is a deficient number, since it is larger than the sum of its proper divisors (2643579).

3116421 is a wasteful number, since it uses less digits than its factorization.

3116421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1526 (or 1520 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 3116421 is about 1765.3387776855. The cubic root of 3116421 is about 146.0669768386.

The spelling of 3116421 in words is "three million, one hundred sixteen thousand, four hundred twenty-one".