11998642 has 8 divisors (see below), whose sum is σ = 18013932. Its totient is φ = 5994000.

The previous prime is 11998621. The next prime is 11998661. The reversal of 11998642 is 24689911.

It can be written as a sum of positive squares in 2 ways, for example, as 11895601 + 103041 = 3449^2 + 321^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 11998595 and 11998604.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1392 + ... + 5092.

Almost surely, 2^11998642 is an apocalyptic number.

11998642 is a deficient number, since it is larger than the sum of its proper divisors (6015290).

11998642 is a wasteful number, since it uses less digits than its factorization.

11998642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5324.

The product of its digits is 31104, while the sum is 40.

The square root of 11998642 is about 3463.9055991756. The cubic root of 11998642 is about 228.9342119519.

The spelling of 11998642 in words is "eleven million, nine hundred ninety-eight thousand, six hundred forty-two".