1247005394 has 16 divisors (see below), whose sum is σ = 1940229720. Its totient is φ = 600378240.

The previous prime is 1247005393. The next prime is 1247005427. The reversal of 1247005394 is 4935007421.

It can be written as a sum of positive squares in 4 ways, for example, as 735114769 + 511890625 = 27113^2 + 22625^2 .

It is not an unprimeable number, because it can be changed into a prime (1247005391) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7187 + ... + 50454.

Almost surely, 2^1247005394 is an apocalyptic number.

1247005394 is a deficient number, since it is larger than the sum of its proper divisors (693224326).

1247005394 is a wasteful number, since it uses less digits than its factorization.

1247005394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58045.

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 1247005394 is about 35312.9635403204. The cubic root of 1247005394 is about 1076.3564327514.

The spelling of 1247005394 in words is "one billion, two hundred forty-seven million, five thousand, three hundred ninety-four".