1263273896 has 32 divisors (see below), whose sum is σ = 2524227840. Its totient is φ = 591315648.

The previous prime is 1263273887. The next prime is 1263273899. The reversal of 1263273896 is 6983723621.

It is a happy number.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a self number, because there is not a number n which added to its sum of digits gives 1263273896.

It is not an unprimeable number, because it can be changed into a prime (1263273899) 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 7 ways as a sum of consecutive naturals, for example, 64391 + ... + 81686.

It is an arithmetic number, because the mean of its divisors is an integer number (78882120).

Almost surely, 2^1263273896 is an apocalyptic number.

It is an amenable number.

1263273896 is a deficient number, since it is larger than the sum of its proper divisors (1260953944).

1263273896 is a wasteful number, since it uses less digits than its factorization.

1263273896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146153 (or 146149 counting only the distinct ones).

The product of its digits is 653184, while the sum is 47.

The square root of 1263273896 is about 35542.5645670089. The cubic root of 1263273896 is about 1081.0169593392.

The spelling of 1263273896 in words is "one billion, two hundred sixty-three million, two hundred seventy-three thousand, eight hundred ninety-six".