12400255 has 32 divisors (see below), whose sum is σ = 18547200. Its totient is φ = 7765632.

The previous prime is 12400247. The next prime is 12400303. The reversal of 12400255 is 55200421.

It is not a de Polignac number, because 12400255 - 2³ = 12400247 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18964 + ... + 19606.

It is an arithmetic number, because the mean of its divisors is an integer number (579600).

Almost surely, 2^12400255 is an apocalyptic number.

12400255 is a deficient number, since it is larger than the sum of its proper divisors (6146945).

12400255 is a wasteful number, since it uses less digits than its factorization.

12400255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 703.

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 12400255 is about 3521.3995797126. The cubic root of 12400255 is about 231.4604920552.

Adding to 12400255 its reverse (55200421), we get a palindrome (67600676).

The spelling of 12400255 in words is "twelve million, four hundred thousand, two hundred fifty-five".