3644042 has 4 divisors (see below), whose sum is σ = 5466066. Its totient is φ = 1822020.

The previous prime is 3644023. The next prime is 3644057. The reversal of 3644042 is 2404463.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2404463 = 17 ⋅141439.

It can be written as a sum of positive squares in only one way, i.e., 2128681 + 1515361 = 1459^2 + 1231^2 .

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 3643999 and 3644017.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 911009 + ... + 911012.

Almost surely, 2^3644042 is an apocalyptic number.

3644042 is a deficient number, since it is larger than the sum of its proper divisors (1822024).

3644042 is a wasteful number, since it uses less digits than its factorization.

3644042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1822023.

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 3644042 is about 1908.9374007547. The cubic root of 3644042 is about 153.8843512462.

The spelling of 3644042 in words is "three million, six hundred forty-four thousand, forty-two".