1211350453 has 48 divisors (see below), whose sum is σ = 1458898560. Its totient is φ = 997539840.

The previous prime is 1211350447. The next prime is 1211350477. The reversal of 1211350453 is 3540531121.

It is a happy number.

It is not a de Polignac number, because 1211350453 - 2¹⁷ = 1211219381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211350403) 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 47 ways as a sum of consecutive naturals, for example, 12488101 + ... + 12488197.

It is an arithmetic number, because the mean of its divisors is an integer number (30393720).

Almost surely, 2^1211350453 is an apocalyptic number.

It is an amenable number.

1211350453 is a deficient number, since it is larger than the sum of its proper divisors (247548107).

1211350453 is a wasteful number, since it uses less digits than its factorization.

1211350453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238 (or 197 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 1211350453 is about 34804.4602457788. The cubic root of 1211350453 is about 1065.9985207080.

Adding to 1211350453 its reverse (3540531121), we get a palindrome (4751881574).

The spelling of 1211350453 in words is "one billion, two hundred eleven million, three hundred fifty thousand, four hundred fifty-three".