1211343450 has 24 divisors (see below), whose sum is σ = 3004132128. Its totient is φ = 323024880.

The previous prime is 1211343443. The next prime is 1211343457. The reversal of 1211343450 is 543431121.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1211343443) and next prime (1211343457).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1211343450.

It is not an unprimeable number, because it can be changed into a prime (1211343457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4037662 + ... + 4037961.

It is an arithmetic number, because the mean of its divisors is an integer number (125172172).

Almost surely, 2^1211343450 is an apocalyptic number.

1211343450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1211343450 is an abundant number, since it is smaller than the sum of its proper divisors (1792788678).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1211343450 is a wasteful number, since it uses less digits than its factorization.

1211343450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8075638 (or 8075633 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 1211343450 is about 34804.3596407117. The cubic root of 1211343450 is about 1065.9964664712.

Adding to 1211343450 its reverse (543431121), we get a palindrome (1754774571).

The spelling of 1211343450 in words is "one billion, two hundred eleven million, three hundred forty-three thousand, four hundred fifty".