1311222394 has 16 divisors (see below), whose sum is σ = 2032649640. Its totient is φ = 633955840.

The previous prime is 1311222379. The next prime is 1311222397. The reversal of 1311222394 is 4932221131.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 430023169 + 881199225 = 20737^2 + 29685^2 .

It is not an unprimeable number, because it can be changed into a prime (1311222397) 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 7 ways as a sum of consecutive naturals, for example, 61489 + ... + 80020.

Almost surely, 2^1311222394 is an apocalyptic number.

1311222394 is a deficient number, since it is larger than the sum of its proper divisors (721427246).

1311222394 is a wasteful number, since it uses less digits than its factorization.

1311222394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141665.

The product of its digits is 2592, while the sum is 28.

The square root of 1311222394 is about 36210.8049344391. The cubic root of 1311222394 is about 1094.5244125004.

The spelling of 1311222394 in words is "one billion, three hundred eleven million, two hundred twenty-two thousand, three hundred ninety-four".