1229742394 has 8 divisors (see below), whose sum is σ = 1848616308. Its totient is φ = 613536960.

The previous prime is 1229742391. The next prime is 1229742427. The reversal of 1229742394 is 4932479221.

It can be written as a sum of positive squares in 2 ways, for example, as 1170529369 + 59213025 = 34213^2 + 7695^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1229742394.

It is not an unprimeable number, because it can be changed into a prime (1229742391) 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 3 ways as a sum of consecutive naturals, for example, 665967 + ... + 667810.

Almost surely, 2^1229742394 is an apocalyptic number.

1229742394 is a deficient number, since it is larger than the sum of its proper divisors (618873914).

1229742394 is a wasteful number, since it uses less digits than its factorization.

1229742394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1334240.

The product of its digits is 217728, while the sum is 43.

The square root of 1229742394 is about 35067.6830429386. The cubic root of 1229742394 is about 1071.3664650917.

The spelling of 1229742394 in words is "one billion, two hundred twenty-nine million, seven hundred forty-two thousand, three hundred ninety-four".