1226963578 has 4 divisors (see below), whose sum is σ = 1840445370. Its totient is φ = 613481788.

The previous prime is 1226963561. The next prime is 1226963629. The reversal of 1226963578 is 8753696221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8753696221 = 1031 ⋅8490491.

It can be written as a sum of positive squares in only one way, i.e., 1222691089 + 4272489 = 34967^2 + 2067^2 .

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306740893 + ... + 306740896.

Almost surely, 2^1226963578 is an apocalyptic number.

1226963578 is a deficient number, since it is larger than the sum of its proper divisors (613481792).

1226963578 is an equidigital number, since it uses as much as digits as its factorization.

1226963578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 613481791.

The product of its digits is 1088640, while the sum is 49.

The square root of 1226963578 is about 35028.0398823571. The cubic root of 1226963578 is about 1070.5588771079.

The spelling of 1226963578 in words is "one billion, two hundred twenty-six million, nine hundred sixty-three thousand, five hundred seventy-eight".