3431605 has 4 divisors (see below), whose sum is σ = 4117932. Its totient is φ = 2745280.

The previous prime is 3431587. The next prime is 3431621. The reversal of 3431605 is 5061343.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5061343 = 7 ⋅723049.

It can be written as a sum of positive squares in 2 ways, for example, as 842724 + 2588881 = 918^2 + 1609^2 .

It is not a de Polignac number, because 3431605 - 2²¹ = 1334453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 343156 + ... + 343165.

It is an arithmetic number, because the mean of its divisors is an integer number (1029483).

Almost surely, 2^3431605 is an apocalyptic number.

It is an amenable number.

3431605 is a deficient number, since it is larger than the sum of its proper divisors (686327).

3431605 is an equidigital number, since it uses as much as digits as its factorization.

3431605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 686326.

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 3431605 is about 1852.4591763383. The cubic root of 3431605 is about 150.8339475435.

Adding to 3431605 its reverse (5061343), we get a palindrome (8492948).

The spelling of 3431605 in words is "three million, four hundred thirty-one thousand, six hundred five".