1213214776 has 8 divisors (see below), whose sum is σ = 2274777720. Its totient is φ = 606607384.

The previous prime is 1213214767. The next prime is 1213214801. The reversal of 1213214776 is 6774123121.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75825916 + ... + 75825931.

It is an arithmetic number, because the mean of its divisors is an integer number (284347215).

Almost surely, 2^1213214776 is an apocalyptic number.

It is an amenable number.

1213214776 is a deficient number, since it is larger than the sum of its proper divisors (1061562944).

1213214776 is a wasteful number, since it uses less digits than its factorization.

1213214776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151651853 (or 151651849 counting only the distinct ones).

The product of its digits is 14112, while the sum is 34.

The square root of 1213214776 is about 34831.2327660105. The cubic root of 1213214776 is about 1066.5451136662.

Adding to 1213214776 its reverse (6774123121), we get a palindrome (7987337897).

The spelling of 1213214776 in words is "one billion, two hundred thirteen million, two hundred fourteen thousand, seven hundred seventy-six".