3642445 has 4 divisors (see below), whose sum is σ = 4370940. Its totient is φ = 2913952.

The previous prime is 3642427. The next prime is 3642449. The reversal of 3642445 is 5442463.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1798281 + 1844164 = 1341^2 + 1358^2 .

It is a cyclic number.

It is not a de Polignac number, because 3642445 - 2⁹ = 3641933 is a prime.

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, 364240 + ... + 364249.

It is an arithmetic number, because the mean of its divisors is an integer number (1092735).

Almost surely, 2^3642445 is an apocalyptic number.

It is an amenable number.

3642445 is a deficient number, since it is larger than the sum of its proper divisors (728495).

3642445 is an equidigital number, since it uses as much as digits as its factorization.

3642445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 728494.

The product of its digits is 11520, while the sum is 28.

The square root of 3642445 is about 1908.5190593756. The cubic root of 3642445 is about 153.8618680423.

It can be divided in two parts, 364 and 2445, that added together give a square (2809 = 53²).

The spelling of 3642445 in words is "three million, six hundred forty-two thousand, four hundred forty-five".