12439755 has 12 divisors (see below), whose sum is σ = 21562320. Its totient is φ = 6634512.

The previous prime is 12439751. The next prime is 12439783. The reversal of 12439755 is 55793421.

It is not a de Polignac number, because 12439755 - 2² = 12439751 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12439751) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 138175 + ... + 138264.

It is an arithmetic number, because the mean of its divisors is an integer number (1796860).

Almost surely, 2^12439755 is an apocalyptic number.

12439755 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12439755 is a deficient number, since it is larger than the sum of its proper divisors (9122565).

12439755 is a wasteful number, since it uses less digits than its factorization.

12439755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276450 (or 276447 counting only the distinct ones).

The product of its digits is 37800, while the sum is 36.

The square root of 12439755 is about 3527.0036858501. The cubic root of 12439755 is about 231.7059977273.

The spelling of 12439755 in words is "twelve million, four hundred thirty-nine thousand, seven hundred fifty-five".