3185421 has 4 divisors (see below), whose sum is σ = 4247232. Its totient is φ = 2123612.

The previous prime is 3185417. The next prime is 3185423. The reversal of 3185421 is 1245813.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1245813 = 3 ⋅415271.

It is a cyclic number.

It is not a de Polignac number, because 3185421 - 2² = 3185417 is a prime.

It is a D-number.

3185421 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 3185391 and 3185400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3185423) 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, 530901 + ... + 530906.

It is an arithmetic number, because the mean of its divisors is an integer number (1061808).

Almost surely, 2^3185421 is an apocalyptic number.

It is an amenable number.

3185421 is a deficient number, since it is larger than the sum of its proper divisors (1061811).

3185421 is a wasteful number, since it uses less digits than its factorization.

3185421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1061810.

The product of its digits is 960, while the sum is 24.

The square root of 3185421 is about 1784.7747757070. The cubic root of 3185421 is about 147.1371296623.

The spelling of 3185421 in words is "three million, one hundred eighty-five thousand, four hundred twenty-one".