3642439 has 4 divisors (see below), whose sum is σ = 3648456. Its totient is φ = 3636424.

The previous prime is 3642427. The next prime is 3642449. The reversal of 3642439 is 9342463.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3642439 - 2¹¹ = 3640391 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3642439.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3642449) 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, 1984 + ... + 3349.

It is an arithmetic number, because the mean of its divisors is an integer number (912114).

Almost surely, 2^3642439 is an apocalyptic number.

3642439 is a deficient number, since it is larger than the sum of its proper divisors (6017).

3642439 is an equidigital number, since it uses as much as digits as its factorization.

3642439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6016.

The product of its digits is 15552, while the sum is 31.

The square root of 3642439 is about 1908.5174874756. The cubic root of 3642439 is about 153.8617835595.

It can be divided in two parts, 36424 and 39, that added together give a palindrome (36463).

The spelling of 3642439 in words is "three million, six hundred forty-two thousand, four hundred thirty-nine".