12205951 has 4 divisors (see below), whose sum is σ = 12326904. Its totient is φ = 12085000.

The previous prime is 12205933. The next prime is 12205957. The reversal of 12205951 is 15950221.

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

It is a cyclic number.

It is not a de Polignac number, because 12205951 - 2¹¹ = 12203903 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 (12205957) 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, 60325 + ... + 60526.

It is an arithmetic number, because the mean of its divisors is an integer number (3081726).

Almost surely, 2^12205951 is an apocalyptic number.

12205951 is a deficient number, since it is larger than the sum of its proper divisors (120953).

12205951 is a wasteful number, since it uses less digits than its factorization.

12205951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120952.

The product of its (nonzero) digits is 900, while the sum is 25.

The square root of 12205951 is about 3493.7016186274. The cubic root of 12205951 is about 230.2451764860.

The spelling of 12205951 in words is "twelve million, two hundred five thousand, nine hundred fifty-one".