12400004 has 12 divisors (see below), whose sum is σ = 22976604. Its totient is φ = 5835264.

The previous prime is 12400001. The next prime is 12400009. The reversal of 12400004 is 40000421.

12400004 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 9935104 + 2464900 = 3152^2 + 1570^2 .

It is not an unprimeable number, because it can be changed into a prime (12400001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91109 + ... + 91244.

It is an arithmetic number, because the mean of its divisors is an integer number (1914717).

Almost surely, 2^12400004 is an apocalyptic number.

It is an amenable number.

12400004 is a deficient number, since it is larger than the sum of its proper divisors (10576600).

12400004 is a wasteful number, since it uses less digits than its factorization.

12400004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182374 (or 182372 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 12400004 is about 3521.3639402936. The cubic root of 12400004 is about 231.4589303406.

Adding to 12400004 its reverse (40000421), we get a palindrome (52400425).

The spelling of 12400004 in words is "twelve million, four hundred thousand, four".