12404142 has 24 divisors (see below), whose sum is σ = 26949000. Its totient is φ = 4123440.

The previous prime is 12404089. The next prime is 12404143. The reversal of 12404142 is 24140421.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12404143) 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, 8292 + ... + 9672.

It is an arithmetic number, because the mean of its divisors is an integer number (1122875).

Almost surely, 2^12404142 is an apocalyptic number.

12404142 is an abundant number, since it is smaller than the sum of its proper divisors (14544858).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12404142 is a wasteful number, since it uses less digits than its factorization.

12404142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1888 (or 1885 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 12404142 is about 3521.9514477062. The cubic root of 12404142 is about 231.4846741639.

Adding to 12404142 its reverse (24140421), we get a palindrome (36544563).

The spelling of 12404142 in words is "twelve million, four hundred four thousand, one hundred forty-two".