25781046 has 16 divisors (see below), whose sum is σ = 52820208. Its totient is φ = 8384000.

The previous prime is 25781033. The next prime is 25781069. The reversal of 25781046 is 64018752.

It is a super-3 number, since 3×25781046³ (a number of 23 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25780998 and 25781016.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52155 + ... + 52646.

It is an arithmetic number, because the mean of its divisors is an integer number (3301263).

Almost surely, 2^25781046 is an apocalyptic number.

25781046 is an abundant number, since it is smaller than the sum of its proper divisors (27039162).

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

25781046 is a wasteful number, since it uses less digits than its factorization.

25781046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104847.

The product of its (nonzero) digits is 13440, while the sum is 33.

The square root of 25781046 is about 5077.5039143264. The cubic root of 25781046 is about 295.4156584316.

Adding to 25781046 its reverse (64018752), we get a palindrome (89799798).

The spelling of 25781046 in words is "twenty-five million, seven hundred eighty-one thousand, forty-six".