1267012001 has 16 divisors (see below), whose sum is σ = 1322956800. Its totient is φ = 1211947968.

The previous prime is 1267011959. The next prime is 1267012003. The reversal of 1267012001 is 1002107621.

It is a cyclic number.

It is not a de Polignac number, because 1267012001 - 2⁶ = 1267011937 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1267012003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2644880 + ... + 2645358.

It is an arithmetic number, because the mean of its divisors is an integer number (82684800).

Almost surely, 2^1267012001 is an apocalyptic number.

It is an amenable number.

1267012001 is a deficient number, since it is larger than the sum of its proper divisors (55944799).

1267012001 is a wasteful number, since it uses less digits than its factorization.

1267012001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1168.

The product of its (nonzero) digits is 168, while the sum is 20.

The square root of 1267012001 is about 35595.1120380313. The cubic root of 1267012001 is about 1082.0821745291.

Adding to 1267012001 its reverse (1002107621), we get a palindrome (2269119622).

The spelling of 1267012001 in words is "one billion, two hundred sixty-seven million, twelve thousand, one".