12019971 has 16 divisors (see below), whose sum is σ = 16636928. Its totient is φ = 7711200.

The previous prime is 12019957. The next prime is 12019993. The reversal of 12019971 is 17991021.

12019971 is digitally balanced in base 2, base 3 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12019971 - 2⁶ = 12019907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12019171) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28341 + ... + 28761.

It is an arithmetic number, because the mean of its divisors is an integer number (1039808).

Almost surely, 2^12019971 is an apocalyptic number.

12019971 is a deficient number, since it is larger than the sum of its proper divisors (4616957).

12019971 is a wasteful number, since it uses less digits than its factorization.

12019971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 762.

The product of its (nonzero) digits is 1134, while the sum is 30.

The square root of 12019971 is about 3466.9829823638. The cubic root of 12019971 is about 229.0697841643.

The spelling of 12019971 in words is "twelve million, nineteen thousand, nine hundred seventy-one".