3421631 has 2 divisors, whose sum is σ = 3421632. Its totient is φ = 3421630.

The previous prime is 3421603. The next prime is 3421633. The reversal of 3421631 is 1361243.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3421631 - 2⁶ = 3421567 is a prime.

It is a super-2 number, since 2×3421631² = 23415117400322, which contains 22 as substring.

Together with 3421633, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3421633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1710815 + 1710816.

It is an arithmetic number, because the mean of its divisors is an integer number (1710816).

Almost surely, 2^3421631 is an apocalyptic number.

3421631 is a deficient number, since it is larger than the sum of its proper divisors (1).

3421631 is an equidigital number, since it uses as much as digits as its factorization.

3421631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 432, while the sum is 20.

The square root of 3421631 is about 1849.7651202247. The cubic root of 3421631 is about 150.6876721916.

Adding to 3421631 its reverse (1361243), we get a palindrome (4782874).

It can be divided in two parts, 34216 and 31, that multiplied together give a triangular number (1060696 = T₁₄₅₆).

The spelling of 3421631 in words is "three million, four hundred twenty-one thousand, six hundred thirty-one".