2042645 has 8 divisors (see below), whose sum is σ = 2674080. Its totient is φ = 1485520.

The previous prime is 2042627. The next prime is 2042647. The reversal of 2042645 is 5462402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2042645 - 2⁶ = 2042581 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2042645.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2042647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18515 + ... + 18624.

It is an arithmetic number, because the mean of its divisors is an integer number (334260).

2^2042645 is an apocalyptic number.

It is an amenable number.

2042645 is a deficient number, since it is larger than the sum of its proper divisors (631435).

2042645 is a wasteful number, since it uses less digits than its factorization.

2042645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37155.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 2042645 is about 1429.2113209739. The cubic root of 2042645 is about 126.8813035282.

The spelling of 2042645 in words is "two million, forty-two thousand, six hundred forty-five".