1212085730 has 16 divisors (see below), whose sum is σ = 2212484544. Its totient is φ = 478005360.

The previous prime is 1212085729. The next prime is 1212085739. The reversal of 1212085730 is 375802121.

It is a junction number, because it is equal to n+sod(n) for n = 1212085693 and 1212085702.

It is not an unprimeable number, because it can be changed into a prime (1212085739) 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 7 ways as a sum of consecutive naturals, for example, 852872 + ... + 854291.

It is an arithmetic number, because the mean of its divisors is an integer number (138280284).

Almost surely, 2^1212085730 is an apocalyptic number.

1212085730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1212085730 is a deficient number, since it is larger than the sum of its proper divisors (1000398814).

1212085730 is a wasteful number, since it uses less digits than its factorization.

1212085730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1707241.

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 1212085730 is about 34815.0216142400. The cubic root of 1212085730 is about 1066.2141603849.

Adding to 1212085730 its reverse (375802121), we get a palindrome (1587887851).

The spelling of 1212085730 in words is "one billion, two hundred twelve million, eighty-five thousand, seven hundred thirty".