1211545463 has 2 divisors, whose sum is σ = 1211545464. Its totient is φ = 1211545462.

The previous prime is 1211545453. The next prime is 1211545481. The reversal of 1211545463 is 3645451121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1211545463 - 2¹⁴ = 1211529079 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1211545453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605772731 + 605772732.

It is an arithmetic number, because the mean of its divisors is an integer number (605772732).

Almost surely, 2^1211545463 is an apocalyptic number.

1211545463 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211545463 is an equidigital number, since it uses as much as digits as its factorization.

1211545463 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14400, while the sum is 32.

The square root of 1211545463 is about 34807.2616417896. The cubic root of 1211545463 is about 1066.0557211151.

Adding to 1211545463 its reverse (3645451121), we get a palindrome (4856996584).

The spelling of 1211545463 in words is "one billion, two hundred eleven million, five hundred forty-five thousand, four hundred sixty-three".