25021212 has 24 divisors (see below), whose sum is σ = 61817616. Its totient is φ = 7849728.

The previous prime is 25021189. The next prime is 25021219. The reversal of 25021212 is 21212052.

It is a super-2 number, since 2×25021212² = 1252122099897888, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25021191 and 25021200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25021219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61123 + ... + 61530.

It is an arithmetic number, because the mean of its divisors is an integer number (2575734).

Almost surely, 2^25021212 is an apocalyptic number.

It is an amenable number.

25021212 is an abundant number, since it is smaller than the sum of its proper divisors (36796404).

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

25021212 is a wasteful number, since it uses less digits than its factorization.

25021212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122677 (or 122675 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 25021212 is about 5002.1207502418. The cubic root of 25021212 is about 292.4844494618.

Adding to 25021212 its reverse (21212052), we get a palindrome (46233264).

The spelling of 25021212 in words is "twenty-five million, twenty-one thousand, two hundred twelve".