25381642 has 16 divisors (see below), whose sum is σ = 44728992. Its totient is φ = 10649520.

The previous prime is 25381639. The next prime is 25381651. The reversal of 25381642 is 24618352.

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, 44088 + ... + 44659.

It is an arithmetic number, because the mean of its divisors is an integer number (2795562).

Almost surely, 2^25381642 is an apocalyptic number.

25381642 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

25381642 is a deficient number, since it is larger than the sum of its proper divisors (19347350).

25381642 is a wasteful number, since it uses less digits than its factorization.

25381642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88773.

The product of its digits is 11520, while the sum is 31.

The square root of 25381642 is about 5038.0196506167. The cubic root of 25381642 is about 293.8821700682.

Adding to 25381642 its reverse (24618352), we get a palindrome (49999994).

The spelling of 25381642 in words is "twenty-five million, three hundred eighty-one thousand, six hundred forty-two".