12731742 has 96 divisors (see below), whose sum is σ = 32078592. Its totient is φ = 3763584.

The previous prime is 12731723. The next prime is 12731743. The reversal of 12731742 is 24713721.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

Its product of digits (2352) is a multiple of the sum of its prime divisors (112).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12731743) 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 47 ways as a sum of consecutive naturals, for example, 189993 + ... + 190059.

It is an arithmetic number, because the mean of its divisors is an integer number (334152).

Almost surely, 2^12731742 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12731742, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16039296).

12731742 is an abundant number, since it is smaller than the sum of its proper divisors (19346850).

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

12731742 is a wasteful number, since it uses less digits than its factorization.

12731742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124 (or 112 counting only the distinct ones).

The product of its digits is 2352, while the sum is 27.

The square root of 12731742 is about 3568.1566669641. The cubic root of 12731742 is about 233.5048702342.

The spelling of 12731742 in words is "twelve million, seven hundred thirty-one thousand, seven hundred forty-two".