12142755 has 24 divisors (see below), whose sum is σ = 21200400. Its totient is φ = 6429120.

The previous prime is 12142733. The next prime is 12142759. The reversal of 12142755 is 55724121.

It is not a de Polignac number, because 12142755 - 2⁸ = 12142499 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12142759) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5800 + ... + 7610.

It is an arithmetic number, because the mean of its divisors is an integer number (883350).

Almost surely, 2^12142755 is an apocalyptic number.

12142755 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12142755 is a deficient number, since it is larger than the sum of its proper divisors (9057645).

12142755 is a wasteful number, since it uses less digits than its factorization.

12142755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1971 (or 1968 counting only the distinct ones).

The product of its digits is 2800, while the sum is 27.

The square root of 12142755 is about 3484.6456060839. The cubic root of 12142755 is about 229.8471258849.

Adding to 12142755 its reverse (55724121), we get a palindrome (67866876).

It can be divided in two parts, 1214 and 2755, that added together give a square (3969 = 63²).

The spelling of 12142755 in words is "twelve million, one hundred forty-two thousand, seven hundred fifty-five".