12005951 has 4 divisors (see below), whose sum is σ = 12068352. Its totient is φ = 11943552.

The previous prime is 12005941. The next prime is 12005953. The reversal of 12005951 is 15950021.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12005951 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12005953) 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, 30911 + ... + 31296.

It is an arithmetic number, because the mean of its divisors is an integer number (3017088).

Almost surely, 2^12005951 is an apocalyptic number.

12005951 is a deficient number, since it is larger than the sum of its proper divisors (62401).

12005951 is an equidigital number, since it uses as much as digits as its factorization.

12005951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62400.

The product of its (nonzero) digits is 450, while the sum is 23.

The square root of 12005951 is about 3464.9604615349. The cubic root of 12005951 is about 228.9806877811.

Adding to 12005951 its reverse (15950021), we get a palindrome (27955972).

The spelling of 12005951 in words is "twelve million, five thousand, nine hundred fifty-one".