1261212676 has 6 divisors (see below), whose sum is σ = 2207122190. Its totient is φ = 630606336.

The previous prime is 1261212671. The next prime is 1261212679. The reversal of 1261212676 is 6762121621.

It can be written as a sum of positive squares in only one way, i.e., 1127347776 + 133864900 = 33576^2 + 11570^2 .

It is not an unprimeable number, because it can be changed into a prime (1261212671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157651581 + ... + 157651588.

Almost surely, 2^1261212676 is an apocalyptic number.

It is an amenable number.

1261212676 is a deficient number, since it is larger than the sum of its proper divisors (945909514).

1261212676 is a wasteful number, since it uses less digits than its factorization.

1261212676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315303173 (or 315303171 counting only the distinct ones).

The product of its digits is 12096, while the sum is 34.

The square root of 1261212676 is about 35513.5562285728. The cubic root of 1261212676 is about 1080.4286924106.

The spelling of 1261212676 in words is "one billion, two hundred sixty-one million, two hundred twelve thousand, six hundred seventy-six".