1213262766 has 32 divisors (see below), whose sum is σ = 2854738080. Its totient is φ = 380631168.

The previous prime is 1213262761. The next prime is 1213262797. The reversal of 1213262766 is 6672623121.

1213262766 is a `hidden beast` number, since 1 + 21 + 3 + 2 + 627 + 6 + 6 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 1213262766.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213262761) 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, 659901 + ... + 661736.

It is an arithmetic number, because the mean of its divisors is an integer number (89210565).

Almost surely, 2^1213262766 is an apocalyptic number.

1213262766 is an abundant number, since it is smaller than the sum of its proper divisors (1641475314).

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

1213262766 is a wasteful number, since it uses less digits than its factorization.

1213262766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1321665 (or 1321659 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 1213262766 is about 34831.9216524153. The cubic root of 1213262766 is about 1066.5591762560.

Adding to 1213262766 its reverse (6672623121), we get a palindrome (7885885887).

The spelling of 1213262766 in words is "one billion, two hundred thirteen million, two hundred sixty-two thousand, seven hundred sixty-six".