25305012 has 36 divisors (see below), whose sum is σ = 64848420. Its totient is φ = 8318592.

The previous prime is 25305001. The next prime is 25305013. The reversal of 25305012 is 21050352.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 21288996 + 4016016 = 4614^2 + 2004^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25305013) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2187 + ... + 7442.

It is an arithmetic number, because the mean of its divisors is an integer number (1801345).

Almost surely, 2^25305012 is an apocalyptic number.

It is an amenable number.

25305012 is an abundant number, since it is smaller than the sum of its proper divisors (39543408).

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

25305012 is a wasteful number, since it uses less digits than its factorization.

25305012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9712 (or 9707 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 25305012 is about 5030.4087309085. The cubic root of 25305012 is about 293.5861176111.

Adding to 25305012 its reverse (21050352), we get a palindrome (46355364).

The spelling of 25305012 in words is "twenty-five million, three hundred five thousand, twelve".