2486781 has 20 divisors (see below), whose sum is σ = 4053984. Its totient is φ = 1506600.

The previous prime is 2486767. The next prime is 2486801. The reversal of 2486781 is 1876842.

It is not a de Polignac number, because 2486781 - 2⁶ = 2486717 is a prime.

It is a super-2 number, since 2×2486781² = 12368159483922, which contains 22 as substring.

2486781 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2486761) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 505 + ... + 2286.

2^2486781 is an apocalyptic number.

It is an amenable number.

2486781 is a deficient number, since it is larger than the sum of its proper divisors (1567203).

2486781 is a wasteful number, since it uses less digits than its factorization.

2486781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2814 (or 2805 counting only the distinct ones).

The product of its digits is 21504, while the sum is 36.

The square root of 2486781 is about 1576.9530747616. The cubic root of 2486781 is about 135.4812453902.

The spelling of 2486781 in words is "two million, four hundred eighty-six thousand, seven hundred eighty-one".