1213146263 has 6 divisors (see below), whose sum is σ = 1411211016. Its totient is φ = 1039839612.

The previous prime is 1213146239. The next prime is 1213146307. The reversal of 1213146263 is 3626413121.

It is not a de Polignac number, because 1213146263 - 2¹⁶ = 1213080727 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 (1213140263) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12378995 + ... + 12379092.

It is an arithmetic number, because the mean of its divisors is an integer number (235201836).

Almost surely, 2^1213146263 is an apocalyptic number.

1213146263 is a deficient number, since it is larger than the sum of its proper divisors (198064753).

1213146263 is an equidigital number, since it uses as much as digits as its factorization.

1213146263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24758101 (or 24758094 counting only the distinct ones).

The product of its digits is 5184, while the sum is 29.

The square root of 1213146263 is about 34830.2492526252. The cubic root of 1213146263 is about 1066.5250365448.

Adding to 1213146263 its reverse (3626413121), we get a palindrome (4839559384).

The spelling of 1213146263 in words is "one billion, two hundred thirteen million, one hundred forty-six thousand, two hundred sixty-three".