3173421 has 4 divisors (see below), whose sum is σ = 4231232. Its totient is φ = 2115612.

The previous prime is 3173419. The next prime is 3173477. The reversal of 3173421 is 1243713.

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: 1243713 = 3 ⋅414571.

It is not a de Polignac number, because 3173421 - 2¹ = 3173419 is a prime.

It is a D-number.

It is a Duffinian number.

3173421 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3173021) 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, 528901 + ... + 528906.

It is an arithmetic number, because the mean of its divisors is an integer number (1057808).

Almost surely, 2^3173421 is an apocalyptic number.

It is an amenable number.

3173421 is a deficient number, since it is larger than the sum of its proper divisors (1057811).

3173421 is a wasteful number, since it uses less digits than its factorization.

3173421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1057810.

The product of its digits is 504, while the sum is 21.

The square root of 3173421 is about 1781.4098349341. The cubic root of 3173421 is about 146.9521339829.

The spelling of 3173421 in words is "three million, one hundred seventy-three thousand, four hundred twenty-one".