2042566 has 4 divisors (see below), whose sum is σ = 3063852. Its totient is φ = 1021282.

The previous prime is 2042549. The next prime is 2042581. The reversal of 2042566 is 6652402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6652402 = 2 ⋅3326201.

It is a self number, because there is not a number n which added to its sum of digits gives 2042566.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510640 + ... + 510643.

It is an arithmetic number, because the mean of its divisors is an integer number (765963).

2^2042566 is an apocalyptic number.

2042566 is a deficient number, since it is larger than the sum of its proper divisors (1021286).

2042566 is a wasteful number, since it uses less digits than its factorization.

2042566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1021285.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 2042566 is about 1429.1836830863. The cubic root of 2042566 is about 126.8796677811.

Adding to 2042566 its reverse (6652402), we get a palindrome (8694968).

The spelling of 2042566 in words is "two million, forty-two thousand, five hundred sixty-six".