1267047312 has 20 divisors (see below), whose sum is σ = 3273205680. Its totient is φ = 422349088.

The previous prime is 1267047311. The next prime is 1267047337. The reversal of 1267047312 is 2137407621.

It is not an unprimeable number, because it can be changed into a prime (1267047311) 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, 13198362 + ... + 13198457.

It is an arithmetic number, because the mean of its divisors is an integer number (163660284).

Almost surely, 2^1267047312 is an apocalyptic number.

1267047312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1267047312 is an abundant number, since it is smaller than the sum of its proper divisors (2006158368).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1267047312 is a wasteful number, since it uses less digits than its factorization.

1267047312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26396830 (or 26396824 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 33.

The square root of 1267047312 is about 35595.6080436899. The cubic root of 1267047312 is about 1082.0922268014.

The spelling of 1267047312 in words is "one billion, two hundred sixty-seven million, forty-seven thousand, three hundred twelve".