1214350661 has 2 divisors, whose sum is σ = 1214350662. Its totient is φ = 1214350660.

The previous prime is 1214350651. The next prime is 1214350699. The reversal of 1214350661 is 1660534121.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1136364100 + 77986561 = 33710^2 + 8831^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1214350661 is a prime.

It is a super-2 number, since 2×1214350661² = 2949295055742273842, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1214350651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 607175330 + 607175331.

It is an arithmetic number, because the mean of its divisors is an integer number (607175331).

Almost surely, 2^1214350661 is an apocalyptic number.

It is an amenable number.

1214350661 is a deficient number, since it is larger than the sum of its proper divisors (1).

1214350661 is an equidigital number, since it uses as much as digits as its factorization.

1214350661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 1214350661 is about 34847.5345038928. The cubic root of 1214350661 is about 1066.8778645065.

Adding to 1214350661 its reverse (1660534121), we get a palindrome (2874884782).

The spelling of 1214350661 in words is "one billion, two hundred fourteen million, three hundred fifty thousand, six hundred sixty-one".