25851860 has 12 divisors (see below), whose sum is σ = 54288948. Its totient is φ = 10340736.

The previous prime is 25851851. The next prime is 25851869. The reversal of 25851860 is 6815852.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (25851851) and next prime (25851869).

It can be written as a sum of positive squares in 2 ways, for example, as 15904144 + 9947716 = 3988^2 + 3154^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 25851860.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25851869) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 646277 + ... + 646316.

It is an arithmetic number, because the mean of its divisors is an integer number (4524079).

Almost surely, 2^25851860 is an apocalyptic number.

25851860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25851860 is an abundant number, since it is smaller than the sum of its proper divisors (28437088).

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

25851860 is a wasteful number, since it uses less digits than its factorization.

25851860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1292602 (or 1292600 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 35.

The square root of 25851860 is about 5084.4724406766. The cubic root of 25851860 is about 295.6858884813.

The spelling of 25851860 in words is "twenty-five million, eight hundred fifty-one thousand, eight hundred sixty".