12195977 has 8 divisors (see below), whose sum is σ = 12640776. Its totient is φ = 11757312.

The previous prime is 12195973. The next prime is 12195991. The reversal of 12195977 is 77959121.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 4682896 + 7513081 = 2164^2 + 2741^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 12195977 - 2² = 12195973 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12195973) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2723 + ... + 5639.

It is an arithmetic number, because the mean of its divisors is an integer number (1580097).

Almost surely, 2^12195977 is an apocalyptic number.

It is an amenable number.

12195977 is a deficient number, since it is larger than the sum of its proper divisors (444799).

12195977 is a wasteful number, since it uses less digits than its factorization.

12195977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3067.

The product of its digits is 39690, while the sum is 41.

The square root of 12195977 is about 3492.2739010564. The cubic root of 12195977 is about 230.1824450312.

The spelling of 12195977 in words is "twelve million, one hundred ninety-five thousand, nine hundred seventy-seven".