11997642 has 8 divisors (see below), whose sum is σ = 23995296. Its totient is φ = 3999212.

The previous prime is 11997637. The next prime is 11997647. The reversal of 11997642 is 24679911.

11997642 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (11997637) and next prime (11997647).

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

11997642 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 11997642.

It is not an unprimeable number, because it can be changed into a prime (11997647) 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, 999798 + ... + 999809.

It is an arithmetic number, because the mean of its divisors is an integer number (2999412).

Almost surely, 2^11997642 is an apocalyptic number.

11997642 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

11997642 is a wasteful number, since it uses less digits than its factorization.

11997642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1999612.

The product of its digits is 27216, while the sum is 39.

The square root of 11997642 is about 3463.7612504328. The cubic root of 11997642 is about 228.9278517718.

The spelling of 11997642 in words is "eleven million, nine hundred ninety-seven thousand, six hundred forty-two".