2564942 has 4 divisors (see below), whose sum is σ = 3847416. Its totient is φ = 1282470.

The previous prime is 2564921. The next prime is 2564957. The reversal of 2564942 is 2494652.

2564942 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a junction number, because it is equal to n+sod(n) for n = 2564899 and 2564908.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 641234 + ... + 641237.

It is an arithmetic number, because the mean of its divisors is an integer number (961854).

2^2564942 is an apocalyptic number.

2564942 is a deficient number, since it is larger than the sum of its proper divisors (1282474).

2564942 is a wasteful number, since it uses less digits than its factorization.

2564942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1282473.

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

The square root of 2564942 is about 1601.5436303766. The cubic root of 2564942 is about 136.8860472864.

The spelling of 2564942 in words is "two million, five hundred sixty-four thousand, nine hundred forty-two".