1213914761284 has 27 divisors (see below), whose sum is σ = 2154970419231. Its totient is φ = 598331560680.

The previous prime is 1213914761281. The next prime is 1213914761369. The reversal of 1213914761284 is 4821674193121.

The square root of 1213914761284 is 1101778.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1213914761281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 156448597 + ... + 156456355.

Almost surely, 2^{1213914761284} is an apocalyptic number.

1213914761284 is the 1101778-th square number.

It is an amenable number.

1213914761284 is a deficient number, since it is larger than the sum of its proper divisors (941055657947).

1213914761284 is an frugal number, since it uses more digits than its factorization.

1213914761284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15664 (or 7832 counting only the distinct ones).

The product of its digits is 580608, while the sum is 49.

Multiplying 1213914761284 by its sum of digits (49), we get a square (59481823302916 = 7712446²).

The spelling of 1213914761284 in words is "one trillion, two hundred thirteen billion, nine hundred fourteen million, seven hundred sixty-one thousand, two hundred eighty-four".