1267820012 has 12 divisors (see below), whose sum is σ = 2218976760. Its totient is φ = 633826656.

The previous prime is 1267819997. The next prime is 1267820023. The reversal of 1267820012 is 2100287621.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24203 + ... + 55869.

It is an arithmetic number, because the mean of its divisors is an integer number (184914730).

Almost surely, 2^1267820012 is an apocalyptic number.

It is an amenable number.

1267820012 is a deficient number, since it is larger than the sum of its proper divisors (951156748).

1267820012 is a wasteful number, since it uses less digits than its factorization.

1267820012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41680 (or 41678 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 1267820012 is about 35606.4602565321. The cubic root of 1267820012 is about 1082.3121509098.

The spelling of 1267820012 in words is "one billion, two hundred sixty-seven million, eight hundred twenty thousand, twelve".