3171421 has 8 divisors (see below), whose sum is σ = 3477600. Its totient is φ = 2868240.

The previous prime is 3171409. The next prime is 3171431. The reversal of 3171421 is 1241713.

3171421 is a nontrivial binomial coefficient, being equal to C(2519, 2).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3171421 - 2¹⁹ = 2647133 is a prime.

It is a super-2 number, since 2×3171421² = 20115822318482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3171431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1890 + ... + 3148.

It is an arithmetic number, because the mean of its divisors is an integer number (434700).

Almost surely, 2^3171421 is an apocalyptic number.

3171421 is the 2518-th triangular number.

3171421 is the 840-th centered nonagonal number.

It is an amenable number.

3171421 is a deficient number, since it is larger than the sum of its proper divisors (306179).

3171421 is a wasteful number, since it uses less digits than its factorization.

3171421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1499.

The product of its digits is 168, while the sum is 19.

The square root of 3171421 is about 1780.8483933227. The cubic root of 3171421 is about 146.9212560510.

The spelling of 3171421 in words is "three million, one hundred seventy-one thousand, four hundred twenty-one".