12112440 has 32 divisors (see below), whose sum is σ = 36337680. Its totient is φ = 3229952.

The previous prime is 12112433. The next prime is 12112447. The reversal of 12112440 is 4421121.

It is an interprime number because it is at equal distance from previous prime (12112433) and next prime (12112447).

It is a super-2 number, since 2×12112440² = 293422405507200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12112447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50349 + ... + 50588.

Almost surely, 2^12112440 is an apocalyptic number.

12112440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12112440 is an abundant number, since it is smaller than the sum of its proper divisors (24225240).

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

12112440 is a wasteful number, since it uses less digits than its factorization.

12112440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100951 (or 100947 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 12112440 is about 3480.2930911060. The cubic root of 12112440 is about 229.6556915089.

Adding to 12112440 its reverse (4421121), we get a palindrome (16533561).

It can be divided in two parts, 121 and 12440, that added together give a triangular number (12561 = T₁₅₈).

The spelling of 12112440 in words is "twelve million, one hundred twelve thousand, four hundred forty".