1224978263 has 4 divisors (see below), whose sum is σ = 1225166208. Its totient is φ = 1224790320.

The previous prime is 1224978259. The next prime is 1224978283. The reversal of 1224978263 is 3628794221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3628794221 = 13 ⋅279138017.

It is a cyclic number.

It is not a de Polignac number, because 1224978263 - 2² = 1224978259 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 (1224978253) 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, 83831 + ... + 97352.

It is an arithmetic number, because the mean of its divisors is an integer number (306291552).

Almost surely, 2^1224978263 is an apocalyptic number.

1224978263 is a deficient number, since it is larger than the sum of its proper divisors (187945).

1224978263 is an equidigital number, since it uses as much as digits as its factorization.

1224978263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187944.

The product of its digits is 290304, while the sum is 44.

The square root of 1224978263 is about 34999.6894700510. The cubic root of 1224978263 is about 1069.9811517337.

The spelling of 1224978263 in words is "one billion, two hundred twenty-four million, nine hundred seventy-eight thousand, two hundred sixty-three".