1211254253 has 4 divisors (see below), whose sum is σ = 1321368288. Its totient is φ = 1101140220.

The previous prime is 1211254241. The next prime is 1211254309. The reversal of 1211254253 is 3524521121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1211254253 - 2²⁰ = 1210205677 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211254453) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55057001 + ... + 55057022.

It is an arithmetic number, because the mean of its divisors is an integer number (330342072).

Almost surely, 2^1211254253 is an apocalyptic number.

It is an amenable number.

1211254253 is a deficient number, since it is larger than the sum of its proper divisors (110114035).

1211254253 is a wasteful number, since it uses less digits than its factorization.

1211254253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110114034.

The product of its digits is 2400, while the sum is 26.

The square root of 1211254253 is about 34803.0782115605. The cubic root of 1211254253 is about 1065.9703010264.

Adding to 1211254253 its reverse (3524521121), we get a palindrome (4735775374).

The spelling of 1211254253 in words is "one billion, two hundred eleven million, two hundred fifty-four thousand, two hundred fifty-three".