1216252790 has 16 divisors (see below), whose sum is σ = 2190757968. Its totient is φ = 486167136.

The previous prime is 1216252783. The next prime is 1216252813. The reversal of 1216252790 is 972526121.

It is a self number, because there is not a number n which added to its sum of digits gives 1216252790.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 26177 + ... + 55836.

It is an arithmetic number, because the mean of its divisors is an integer number (136922373).

Almost surely, 2^1216252790 is an apocalyptic number.

1216252790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1216252790 is a deficient number, since it is larger than the sum of its proper divisors (974505178).

1216252790 is a wasteful number, since it uses less digits than its factorization.

1216252790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83503.

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 1216252790 is about 34874.8159851776. The cubic root of 1216252790 is about 1067.4346176593.

The spelling of 1216252790 in words is "one billion, two hundred sixteen million, two hundred fifty-two thousand, seven hundred ninety".