2645642 has 8 divisors (see below), whose sum is σ = 4201956. Its totient is φ = 1244992.

The previous prime is 2645639. The next prime is 2645647. The reversal of 2645642 is 2465462.

It can be written as a sum of positive squares in 2 ways, for example, as 2128681 + 516961 = 1459^2 + 719^2 .

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

It is not an unprimeable number, because it can be changed into a prime (2645647) 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, 38873 + ... + 38940.

2^2645642 is an apocalyptic number.

2645642 is a deficient number, since it is larger than the sum of its proper divisors (1556314).

2645642 is a wasteful number, since it uses less digits than its factorization.

2645642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77832.

The product of its digits is 11520, while the sum is 29.

The square root of 2645642 is about 1626.5429597770. The cubic root of 2645642 is about 138.3068506263.

The spelling of 2645642 in words is "two million, six hundred forty-five thousand, six hundred forty-two".