3571421 has 4 divisors (see below), whose sum is σ = 4081632. Its totient is φ = 3061212.

The previous prime is 3571397. The next prime is 3571423. The reversal of 3571421 is 1241753.

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: 1241753 = 467 ⋅2659.

It is not a de Polignac number, because 3571421 - 2¹⁴ = 3555037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3571423) 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, 255095 + ... + 255108.

It is an arithmetic number, because the mean of its divisors is an integer number (1020408).

Almost surely, 2^3571421 is an apocalyptic number.

It is an amenable number.

3571421 is a deficient number, since it is larger than the sum of its proper divisors (510211).

3571421 is an equidigital number, since it uses as much as digits as its factorization.

3571421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510210.

The product of its digits is 840, while the sum is 23.

The square root of 3571421 is about 1889.8203618334. The cubic root of 3571421 is about 152.8552463486.

The spelling of 3571421 in words is "three million, five hundred seventy-one thousand, four hundred twenty-one".