2561486 has 4 divisors (see below), whose sum is σ = 3842232. Its totient is φ = 1280742.

The previous prime is 2561431. The next prime is 2561491. The reversal of 2561486 is 6841652.

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

It is a super-2 number, since 2×2561486² = 13122421056392, which contains 22 as substring.

It is a Curzon number.

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, 640370 + ... + 640373.

It is an arithmetic number, because the mean of its divisors is an integer number (960558).

2^2561486 is an apocalyptic number.

2561486 is a deficient number, since it is larger than the sum of its proper divisors (1280746).

2561486 is a wasteful number, since it uses less digits than its factorization.

2561486 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1280745.

The product of its digits is 11520, while the sum is 32.

The square root of 2561486 is about 1600.4643076308. The cubic root of 2561486 is about 136.8245396170.

The spelling of 2561486 in words is "two million, five hundred sixty-one thousand, four hundred eighty-six".