12787542 has 24 divisors (see below), whose sum is σ = 28178280. Its totient is φ = 4189920.

The previous prime is 12787501. The next prime is 12787547. The reversal of 12787542 is 24578721.

It is a junction number, because it is equal to n+sod(n) for n = 12787497 and 12787506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12787547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4959 + ... + 7082.

It is an arithmetic number, because the mean of its divisors is an integer number (1174095).

Almost surely, 2^12787542 is an apocalyptic number.

12787542 is an abundant number, since it is smaller than the sum of its proper divisors (15390738).

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

12787542 is a wasteful number, since it uses less digits than its factorization.

12787542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12108 (or 12105 counting only the distinct ones).

The product of its digits is 31360, while the sum is 36.

The square root of 12787542 is about 3575.9672817295. The cubic root of 12787542 is about 233.8455039791.

The spelling of 12787542 in words is "twelve million, seven hundred eighty-seven thousand, five hundred forty-two".