25402212 has 72 divisors (see below), whose sum is σ = 73120320. Its totient is φ = 7360320.

The previous prime is 25402193. The next prime is 25402217. The reversal of 25402212 is 21220452.

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

It is not an unprimeable number, because it can be changed into a prime (25402217) 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, 7714 + ... + 10502.

It is an arithmetic number, because the mean of its divisors is an integer number (1015560).

Almost surely, 2^25402212 is an apocalyptic number.

25402212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25402212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36560160).

25402212 is an abundant number, since it is smaller than the sum of its proper divisors (47718108).

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

25402212 is a wasteful number, since it uses less digits than its factorization.

25402212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2833 (or 2828 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 25402212 is about 5040.0607139200. The cubic root of 25402212 is about 293.9615387699.

Adding to 25402212 its reverse (21220452), we get a palindrome (46622664).

The spelling of 25402212 in words is "twenty-five million, four hundred two thousand, two hundred twelve".