3115421 has 4 divisors (see below), whose sum is σ = 3158172. Its totient is φ = 3072672.

The previous prime is 3115417. The next prime is 3115423. The reversal of 3115421 is 1245113.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1792921 + 1322500 = 1339^2 + 1150^2 .

It is a cyclic number.

It is not a de Polignac number, because 3115421 - 2² = 3115417 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3115421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3115423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21266 + ... + 21411.

It is an arithmetic number, because the mean of its divisors is an integer number (789543).

Almost surely, 2^3115421 is an apocalyptic number.

It is an amenable number.

3115421 is a deficient number, since it is larger than the sum of its proper divisors (42751).

3115421 is an equidigital number, since it uses as much as digits as its factorization.

3115421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42750.

The product of its digits is 120, while the sum is 17.

The square root of 3115421 is about 1765.0555232060. The cubic root of 3115421 is about 146.0513517992.

The spelling of 3115421 in words is "three million, one hundred fifteen thousand, four hundred twenty-one".