1261196673 has 12 divisors (see below), whose sum is σ = 1848365904. Its totient is φ = 764361400.

The previous prime is 1261196669. The next prime is 1261196681. The reversal of 1261196673 is 3766911621.

It is not a de Polignac number, because 1261196673 - 2² = 1261196669 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1261196173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1736823 + ... + 1737548.

It is an arithmetic number, because the mean of its divisors is an integer number (154030492).

Almost surely, 2^1261196673 is an apocalyptic number.

It is an amenable number.

1261196673 is a deficient number, since it is larger than the sum of its proper divisors (587169231).

1261196673 is a wasteful number, since it uses less digits than its factorization.

1261196673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3474396 (or 3474385 counting only the distinct ones).

The product of its digits is 81648, while the sum is 42.

The square root of 1261196673 is about 35513.3309195294. The cubic root of 1261196673 is about 1080.4241226887.

The spelling of 1261196673 in words is "one billion, two hundred sixty-one million, one hundred ninety-six thousand, six hundred seventy-three".