2566402 has 8 divisors (see below), whose sum is σ = 3865356. Its totient is φ = 1277952.

The previous prime is 2566367. The next prime is 2566411. The reversal of 2566402 is 2046652.

It can be written as a sum of positive squares in 2 ways, for example, as 2405601 + 160801 = 1551^2 + 401^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1983 + ... + 3010.

2^2566402 is an apocalyptic number.

2566402 is a deficient number, since it is larger than the sum of its proper divisors (1298954).

2566402 is a wasteful number, since it uses less digits than its factorization.

2566402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5252.

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

The square root of 2566402 is about 1601.9993757802. Note that the first 3 decimals coincide. The cubic root of 2566402 is about 136.9120148289.

The spelling of 2566402 in words is "two million, five hundred sixty-six thousand, four hundred two".