1273266285 has 16 divisors (see below), whose sum is σ = 2144448960. Its totient is φ = 643334400.

The previous prime is 1273266227. The next prime is 1273266341. The reversal of 1273266285 is 5826623721.

It is not a de Polignac number, because 1273266285 - 2⁷ = 1273266157 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2233516 + ... + 2234085.

It is an arithmetic number, because the mean of its divisors is an integer number (134028060).

Almost surely, 2^1273266285 is an apocalyptic number.

1273266285 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1273266285 is a deficient number, since it is larger than the sum of its proper divisors (871182675).

1273266285 is a wasteful number, since it uses less digits than its factorization.

1273266285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4467628.

The product of its digits is 241920, while the sum is 42.

The square root of 1273266285 is about 35682.8570184620. The cubic root of 1273266285 is about 1083.8597278245.

The spelling of 1273266285 in words is "one billion, two hundred seventy-three million, two hundred sixty-six thousand, two hundred eighty-five".