12742740 has 36 divisors (see below), whose sum is σ = 38653524. Its totient is φ = 3398016.

The previous prime is 12742729. The next prime is 12742747. The reversal of 12742740 is 4724721.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1971216 + 10771524 = 1404^2 + 3282^2 .

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12742747) 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, 35217 + ... + 35576.

It is an arithmetic number, because the mean of its divisors is an integer number (1073709).

Almost surely, 2^12742740 is an apocalyptic number.

12742740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12742740 is an abundant number, since it is smaller than the sum of its proper divisors (25910784).

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

12742740 is a wasteful number, since it uses less digits than its factorization.

12742740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70808 (or 70803 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 27.

The square root of 12742740 is about 3569.6974661727. The cubic root of 12742740 is about 233.5720866832.

The spelling of 12742740 in words is "twelve million, seven hundred forty-two thousand, seven hundred forty".