12155030 has 16 divisors (see below), whose sum is σ = 22093344. Its totient is φ = 4814400.

The previous prime is 12155029. The next prime is 12155057. The reversal of 12155030 is 3055121.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4871 + ... + 6930.

It is an arithmetic number, because the mean of its divisors is an integer number (1380834).

Almost surely, 2^12155030 is an apocalyptic number.

12155030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12155030 is a deficient number, since it is larger than the sum of its proper divisors (9938314).

12155030 is a wasteful number, since it uses less digits than its factorization.

12155030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11911.

The product of its (nonzero) digits is 150, while the sum is 17.

The square root of 12155030 is about 3486.4064593791. The cubic root of 12155030 is about 229.9245499210.

Subtracting from 12155030 its reverse (3055121), we obtain a palindrome (9099909).

The spelling of 12155030 in words is "twelve million, one hundred fifty-five thousand, thirty".