25705512 has 96 divisors (see below), whose sum is σ = 82555200. Its totient is φ = 7340544.

The previous prime is 25705507. The next prime is 25705517. The reversal of 25705512 is 21550752.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (25705507) and next prime (25705517).

It is a super-3 number, since 3×25705512³ (a number of 23 digits) contains 333 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (25705517) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12664 + ... + 14552.

It is an arithmetic number, because the mean of its divisors is an integer number (859950).

Almost surely, 2^25705512 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25705512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41277600).

25705512 is an abundant number, since it is smaller than the sum of its proper divisors (56849688).

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

25705512 is a wasteful number, since it uses less digits than its factorization.

25705512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1917 (or 1901 counting only the distinct ones).

The product of its (nonzero) digits is 3500, while the sum is 27.

The square root of 25705512 is about 5070.0603546703. The cubic root of 25705512 is about 295.1268706420.

The spelling of 25705512 in words is "twenty-five million, seven hundred five thousand, five hundred twelve".