12207156 has 48 divisors (see below), whose sum is σ = 32485824. Its totient is φ = 3534336.

The previous prime is 12207127. The next prime is 12207179. The reversal of 12207156 is 65170221.

It is a super-3 number, since 3×12207156³ (a number of 22 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 351 + ... + 4953.

It is an arithmetic number, because the mean of its divisors is an integer number (676788).

Almost surely, 2^12207156 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12207156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16242912).

12207156 is an abundant number, since it is smaller than the sum of its proper divisors (20278668).

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

12207156 is a wasteful number, since it uses less digits than its factorization.

12207156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4640 (or 4638 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 24.

The square root of 12207156 is about 3493.8740675645. The cubic root of 12207156 is about 230.2527530172.

Adding to 12207156 its reverse (65170221), we get a palindrome (77377377).

The spelling of 12207156 in words is "twelve million, two hundred seven thousand, one hundred fifty-six".