12021742 has 8 divisors (see below), whose sum is σ = 18097632. Its totient is φ = 5989200.

The previous prime is 12021701. The next prime is 12021749. The reversal of 12021742 is 24712021.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12021749) 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, 10134 + ... + 11257.

It is an arithmetic number, because the mean of its divisors is an integer number (2262204).

Almost surely, 2^12021742 is an apocalyptic number.

12021742 is a deficient number, since it is larger than the sum of its proper divisors (6075890).

12021742 is a wasteful number, since it uses less digits than its factorization.

12021742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21674.

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 12021742 is about 3467.2383823441. The cubic root of 12021742 is about 229.0810338494.

Adding to 12021742 its reverse (24712021), we get a palindrome (36733763).

The spelling of 12021742 in words is "twelve million, twenty-one thousand, seven hundred forty-two".