16542012 has 12 divisors (see below), whose sum is σ = 38598056. Its totient is φ = 5514000.

The previous prime is 16541981. The next prime is 16542017. The reversal of 16542012 is 21024561.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×16542012² = 547276322016288, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 16542012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16542017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 689239 + ... + 689262.

Almost surely, 2^16542012 is an apocalyptic number.

16542012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

16542012 is an abundant number, since it is smaller than the sum of its proper divisors (22056044).

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

16542012 is a wasteful number, since it uses less digits than its factorization.

16542012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1378508 (or 1378506 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 16542012 is about 4067.1872344410. The cubic root of 16542012 is about 254.7980561863.

Adding to 16542012 its reverse (21024561), we get a palindrome (37566573).

The spelling of 16542012 in words is "sixteen million, five hundred forty-two thousand, twelve".