1266274399 has 8 divisors (see below), whose sum is σ = 1435453040. Its totient is φ = 1107349056.

The previous prime is 1266274369. The next prime is 1266274403. The reversal of 1266274399 is 9934726621.

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 1266274399 - 2⁹ = 1266273887 is a prime.

It is a super-2 number, since 2×1266274399² = 3206901707125622402, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1266274369) 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, 2563062 + ... + 2563555.

It is an arithmetic number, because the mean of its divisors is an integer number (179431630).

Almost surely, 2^1266274399 is an apocalyptic number.

1266274399 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1266274399 is a deficient number, since it is larger than the sum of its proper divisors (169178641).

1266274399 is a wasteful number, since it uses less digits than its factorization.

1266274399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5126649.

The product of its digits is 979776, while the sum is 49.

The square root of 1266274399 is about 35584.7495284146. The cubic root of 1266274399 is about 1081.8721526014.

The spelling of 1266274399 in words is "one billion, two hundred sixty-six million, two hundred seventy-four thousand, three hundred ninety-nine".