1266172463 has 4 divisors (see below), whose sum is σ = 1307016768. Its totient is φ = 1225328160.

The previous prime is 1266172441. The next prime is 1266172469. The reversal of 1266172463 is 3642716621.

It is a happy number.

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 1266172463 - 2⁸ = 1266172207 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 (1266172469) 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, 20422106 + ... + 20422167.

It is an arithmetic number, because the mean of its divisors is an integer number (326754192).

Almost surely, 2^1266172463 is an apocalyptic number.

1266172463 is a deficient number, since it is larger than the sum of its proper divisors (40844305).

1266172463 is an equidigital number, since it uses as much as digits as its factorization.

1266172463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40844304.

The product of its digits is 72576, while the sum is 38.

The square root of 1266172463 is about 35583.3172006209. The cubic root of 1266172463 is about 1081.8431213269.

The spelling of 1266172463 in words is "one billion, two hundred sixty-six million, one hundred seventy-two thousand, four hundred sixty-three".