12017642 has 24 divisors (see below), whose sum is σ = 22584996. Its totient is φ = 4753728.

The previous prime is 12017639. The next prime is 12017659. The reversal of 12017642 is 24671021.

It can be written as a sum of positive squares in 2 ways, for example, as 11909401 + 108241 = 3451^2 + 329^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3443 + ... + 5990.

Almost surely, 2^12017642 is an apocalyptic number.

12017642 is a deficient number, since it is larger than the sum of its proper divisors (10567354).

12017642 is a wasteful number, since it uses less digits than its factorization.

12017642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9462 (or 9455 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 12017642 is about 3466.6470832780. The cubic root of 12017642 is about 229.0549882887.

Adding to 12017642 its reverse (24671021), we get a palindrome (36688663).

It can be divided in two parts, 1201764 and 2, that multiplied together give a triangular number (2403528 = T₂₁₉₂).

The spelling of 12017642 in words is "twelve million, seventeen thousand, six hundred forty-two".