12433140 has 36 divisors (see below), whose sum is σ = 37714404. Its totient is φ = 3315456.

The previous prime is 12433121. The next prime is 12433153. The reversal of 12433140 is 4133421.

It can be written as a sum of positive squares in 2 ways, for example, as 6022116 + 6411024 = 2454^2 + 2532^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34357 + ... + 34716.

Almost surely, 2^12433140 is an apocalyptic number.

12433140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12433140 is an abundant number, since it is smaller than the sum of its proper divisors (25281264).

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

12433140 is a wasteful number, since it uses less digits than its factorization.

12433140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69088 (or 69083 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 12433140 is about 3526.0657963231. The cubic root of 12433140 is about 231.6649195620.

Adding to 12433140 its reverse (4133421), we get a palindrome (16566561).

The spelling of 12433140 in words is "twelve million, four hundred thirty-three thousand, one hundred forty".