1294663994 has 24 divisors (see below), whose sum is σ = 2166020220. Its totient is φ = 576922752.

The previous prime is 1294663991. The next prime is 1294663999. The reversal of 1294663994 is 4993664921.

It can be written as a sum of positive squares in 6 ways, for example, as 474586225 + 820077769 = 21785^2 + 28637^2 .

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (1294663991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7739 + ... + 51470.

Almost surely, 2^1294663994 is an apocalyptic number.

1294663994 is a deficient number, since it is larger than the sum of its proper divisors (871356226).

1294663994 is a wasteful number, since it uses less digits than its factorization.

1294663994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59282 (or 59253 counting only the distinct ones).

The product of its digits is 2519424, while the sum is 53.

The square root of 1294663994 is about 35981.4395765372. The cubic root of 1294663994 is about 1089.8975842948.

The spelling of 1294663994 in words is "one billion, two hundred ninety-four million, six hundred sixty-three thousand, nine hundred ninety-four".