1266542012 has 12 divisors (see below), whose sum is σ = 2312816016. Its totient is φ = 605737440.

The previous prime is 1266542009. The next prime is 1266542047. The reversal of 1266542012 is 2102456621.

It is a super-2 number, since 2×1266542012² = 3208257336322016288, which contains 22 as substring.

It is a congruent number.

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, 6883289 + ... + 6883472.

It is an arithmetic number, because the mean of its divisors is an integer number (192734668).

Almost surely, 2^1266542012 is an apocalyptic number.

It is an amenable number.

1266542012 is a deficient number, since it is larger than the sum of its proper divisors (1046274004).

1266542012 is a wasteful number, since it uses less digits than its factorization.

1266542012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13766788 (or 13766786 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 1266542012 is about 35588.5095501343. The cubic root of 1266542012 is about 1081.9483611123.

Adding to 1266542012 its reverse (2102456621), we get a palindrome (3368998633).

The spelling of 1266542012 in words is "one billion, two hundred sixty-six million, five hundred forty-two thousand, twelve".