25981142 has 8 divisors (see below), whose sum is σ = 42514632. Its totient is φ = 11809600.

The previous prime is 25981133. The next prime is 25981169. The reversal of 25981142 is 24118952.

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

It is a junction number, because it is equal to n+sod(n) for n = 25981099 and 25981108.

It is a congruent number.

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, 590459 + ... + 590502.

It is an arithmetic number, because the mean of its divisors is an integer number (5314329).

Almost surely, 2^25981142 is an apocalyptic number.

25981142 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

25981142 is a deficient number, since it is larger than the sum of its proper divisors (16533490).

25981142 is a wasteful number, since it uses less digits than its factorization.

25981142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1180974.

The product of its digits is 5760, while the sum is 32.

The square root of 25981142 is about 5097.1699991270. The cubic root of 25981142 is about 296.1779654777.

The spelling of 25981142 in words is "twenty-five million, nine hundred eighty-one thousand, one hundred forty-two".