2042578 has 4 divisors (see below), whose sum is σ = 3063870. Its totient is φ = 1021288.

The previous prime is 2042549. The next prime is 2042581. The reversal of 2042578 is 8752402.

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

It can be written as a sum of positive squares in only one way, i.e., 1868689 + 173889 = 1367^2 + 417^2 .

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510643 + ... + 510646.

2^2042578 is an apocalyptic number.

2042578 is a deficient number, since it is larger than the sum of its proper divisors (1021292).

2042578 is a wasteful number, since it uses less digits than its factorization.

2042578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1021291.

The product of its (nonzero) digits is 4480, while the sum is 28.

The square root of 2042578 is about 1429.1878812808. The cubic root of 2042578 is about 126.8799162517.

It can be divided in two parts, 20425 and 78, that added together give a triangular number (20503 = T₂₀₂).

The spelling of 2042578 in words is "two million, forty-two thousand, five hundred seventy-eight".