1263394241 has 4 divisors (see below), whose sum is σ = 1284105684. Its totient is φ = 1242682800.

The previous prime is 1263394207. The next prime is 1263394333. The reversal of 1263394241 is 1424933621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1424933621 = 103 ⋅13834307.

It can be written as a sum of positive squares in 2 ways, for example, as 196000000 + 1067394241 = 14000^2 + 32671^2 .

It is a cyclic number.

It is not a de Polignac number, because 1263394241 - 2⁶ = 1263394177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1263394201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10355630 + ... + 10355751.

It is an arithmetic number, because the mean of its divisors is an integer number (321026421).

Almost surely, 2^1263394241 is an apocalyptic number.

It is an amenable number.

1263394241 is a deficient number, since it is larger than the sum of its proper divisors (20711443).

1263394241 is an equidigital number, since it uses as much as digits as its factorization.

1263394241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20711442.

The product of its digits is 31104, while the sum is 35.

The square root of 1263394241 is about 35544.2574968166. The cubic root of 1263394241 is about 1081.0512857181.

The spelling of 1263394241 in words is "one billion, two hundred sixty-three million, three hundred ninety-four thousand, two hundred forty-one".