2942645 has 4 divisors (see below), whose sum is σ = 3531180. Its totient is φ = 2354112.

The previous prime is 2942629. The next prime is 2942657. The reversal of 2942645 is 5462492.

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 734449 + 2208196 = 857^2 + 1486^2 .

It is a cyclic number.

It is not a de Polignac number, because 2942645 - 2⁴ = 2942629 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 294260 + ... + 294269.

It is an arithmetic number, because the mean of its divisors is an integer number (882795).

2^2942645 is an apocalyptic number.

It is an amenable number.

2942645 is a deficient number, since it is larger than the sum of its proper divisors (588535).

2942645 is an equidigital number, since it uses as much as digits as its factorization.

2942645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 588534.

The product of its digits is 17280, while the sum is 32.

The square root of 2942645 is about 1715.4139442129. The cubic root of 2942645 is about 143.2999231064.

The spelling of 2942645 in words is "two million, nine hundred forty-two thousand, six hundred forty-five".