12013542 has 32 divisors (see below), whose sum is σ = 26812800.
Its totient is φ = 3987144.
The previous prime is 12013541. The next prime is 12013549. The reversal of 12013542 is 24531021.
12013542 is a `hidden beast` number, since 120 + 1 + 3 + 542 = 666.
It is a Harshad number since it is a multiple of its sum of digits (18).
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (12013541) by changing a digit.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20173 + ... + 20759.
It is an arithmetic number, because the mean of its divisors is an integer number (837900).
Almost surely, 212013542 is an apocalyptic number.
12013542 is an abundant number, since it is smaller than the sum of its proper divisors (14799258).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
12013542 is a wasteful number, since it uses less digits than its factorization.
12013542 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 977 (or 971 counting only the distinct ones).
The product of its (nonzero) digits is 240, while the sum is 18.
The square root of 12013542 is about 3466.0556833381.
The cubic root of 12013542 is about 229.0289368034.
Adding to 12013542 its reverse (24531021), we get a palindrome (36544563).
The spelling of 12013542 in words is "twelve million, thirteen thousand, five hundred forty-two".