25122006 has 96 divisors (see below), whose sum is σ = 68577600. Its totient is φ = 6604416.

The previous prime is 25121969. The next prime is 25122011. The reversal of 25122006 is 60022152.

It is a super-2 number, since 2×25122006² = 1262230370928072, which contains 22 as substring.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 25122006.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 80106 + ... + 80418.

It is an arithmetic number, because the mean of its divisors is an integer number (714350).

Almost surely, 2^25122006 is an apocalyptic number.

25122006 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 25122006, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34288800).

25122006 is an abundant number, since it is smaller than the sum of its proper divisors (43455594).

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

25122006 is a wasteful number, since it uses less digits than its factorization.

25122006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355 (or 338 counting only the distinct ones).

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

The square root of 25122006 is about 5012.1857507479. The cubic root of 25122006 is about 292.8766657391.

Adding to 25122006 its reverse (60022152), we get a palindrome (85144158).

The spelling of 25122006 in words is "twenty-five million, one hundred twenty-two thousand, six".