2542806 has 72 divisors (see below), whose sum is σ = 6792120. Its totient is φ = 703080.

The previous prime is 2542759. The next prime is 2542817. The reversal of 2542806 is 6082452.

2542806 is nontrivially palindromic in base 5.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a zygodrome in base 5.

It is a self number, because there is not a number n which added to its sum of digits gives 2542806.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 82011 + ... + 82041.

It is an arithmetic number, because the mean of its divisors is an integer number (94335).

2^2542806 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2542806, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3396060).

2542806 is an abundant number, since it is smaller than the sum of its proper divisors (4249314).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2542806 is a wasteful number, since it uses less digits than its factorization.

2542806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87 (or 43 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 2542806 is about 1594.6178225518. The cubic root of 2542806 is about 136.4911236832.

The spelling of 2542806 in words is "two million, five hundred forty-two thousand, eight hundred six".