25212006 has 32 divisors (see below), whose sum is σ = 56210400. Its totient is φ = 8376480.

The previous prime is 25212001. The next prime is 25212013. The reversal of 25212006 is 60021252.

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

It is a self number, because there is not a number n which added to its sum of digits gives 25212006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25212001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22180 + ... + 23288.

It is an arithmetic number, because the mean of its divisors is an integer number (1756575).

Almost surely, 2^25212006 is an apocalyptic number.

25212006 is an abundant number, since it is smaller than the sum of its proper divisors (30998394).

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

25212006 is a wasteful number, since it uses less digits than its factorization.

25212006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1541 (or 1535 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 25212006 is about 5021.1558430306. The cubic root of 25212006 is about 293.2259940710.

Adding to 25212006 its reverse (60021252), we get a palindrome (85233258).

The spelling of 25212006 in words is "twenty-five million, two hundred twelve thousand, six".