12280158 has 48 divisors (see below), whose sum is σ = 29343600. Its totient is φ = 3680640.

The previous prime is 12280157. The next prime is 12280181. The reversal of 12280158 is 85108221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12280157) 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, 21298 + ... + 21866.

It is an arithmetic number, because the mean of its divisors is an integer number (611325).

Almost surely, 2^12280158 is an apocalyptic number.

12280158 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12280158, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14671800).

12280158 is an abundant number, since it is smaller than the sum of its proper divisors (17063442).

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

12280158 is a wasteful number, since it uses less digits than its factorization.

12280158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 697 (or 694 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 27.

The square root of 12280158 is about 3504.3056373553. The cubic root of 12280158 is about 230.7108317355.

Adding to 12280158 its reverse (85108221), we get a palindrome (97388379).

The spelling of 12280158 in words is "twelve million, two hundred eighty thousand, one hundred fifty-eight".