25781030 has 32 divisors (see below), whose sum is σ = 50899968. Its totient is φ = 9324000.

The previous prime is 25781011. The next prime is 25781033. The reversal of 25781030 is 3018752.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25781033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24005 + ... + 25055.

It is an arithmetic number, because the mean of its divisors is an integer number (1590624).

Almost surely, 2^25781030 is an apocalyptic number.

25781030 is a deficient number, since it is larger than the sum of its proper divisors (25118938).

25781030 is a wasteful number, since it uses less digits than its factorization.

25781030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1292.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 25781030 is about 5077.5023387488. The cubic root of 25781030 is about 295.4155973188.

Adding to 25781030 its reverse (3018752), we get a palindrome (28799782).

The spelling of 25781030 in words is "twenty-five million, seven hundred eighty-one thousand, thirty".