2686401 has 12 divisors (see below), whose sum is σ = 3895060. Its totient is φ = 1784160.

The previous prime is 2686393. The next prime is 2686451. The reversal of 2686401 is 1046862.

It can be written as a sum of positive squares in 2 ways, for example, as 129600 + 2556801 = 360^2 + 1599^2 .

It is not a de Polignac number, because 2686401 - 2³ = 2686393 is a prime.

It is a d-powerful number, because it can be written as 2²¹ + 6⁶ + 8³ + 6⁷ + 4⁹ + 0 + 1 .

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2686451) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3435 + ... + 4143.

2^2686401 is an apocalyptic number.

It is an amenable number.

2686401 is a deficient number, since it is larger than the sum of its proper divisors (1208659).

2686401 is a wasteful number, since it uses less digits than its factorization.

2686401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1136 (or 1133 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 2686401 is about 1639.0244049434. The cubic root of 2686401 is about 139.0134900559.

The spelling of 2686401 in words is "two million, six hundred eighty-six thousand, four hundred one".