12071961 has 24 divisors (see below), whose sum is σ = 19344000. Its totient is φ = 7192800.

The previous prime is 12071959. The next prime is 12071981. The reversal of 12071961 is 16917021.

It is not a de Polignac number, because 12071961 - 2¹ = 12071959 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12071951) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5040 + ... + 7038.

It is an arithmetic number, because the mean of its divisors is an integer number (806000).

Almost surely, 2^12071961 is an apocalyptic number.

12071961 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12071961 is a deficient number, since it is larger than the sum of its proper divisors (7272039).

12071961 is a wasteful number, since it uses less digits than its factorization.

12071961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2077 (or 2074 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 27.

The square root of 12071961 is about 3474.4727657589. The cubic root of 12071961 is about 229.3995744422.

Adding to 12071961 its reverse (16917021), we get a palindrome (28988982).

The spelling of 12071961 in words is "twelve million, seventy-one thousand, nine hundred sixty-one".