25851042 has 32 divisors (see below), whose sum is σ = 65654400. Its totient is φ = 7385904.

The previous prime is 25851037. The next prime is 25851073. The reversal of 25851042 is 24015852.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 25850997 and 25851015.

It is an unprimeable number.

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, 33817 + ... + 34572.

It is an arithmetic number, because the mean of its divisors is an integer number (2051700).

Almost surely, 2^25851042 is an apocalyptic number.

25851042 is an abundant number, since it is smaller than the sum of its proper divisors (39803358).

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

25851042 is a wasteful number, since it uses less digits than its factorization.

25851042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68407 (or 68401 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

The square root of 25851042 is about 5084.3919990496. The cubic root of 25851042 is about 295.6827697682.

Adding to 25851042 its reverse (24015852), we get a palindrome (49866894).

The spelling of 25851042 in words is "twenty-five million, eight hundred fifty-one thousand, forty-two".