1245447713 has 4 divisors (see below), whose sum is σ = 1279108500. Its totient is φ = 1211786928.

The previous prime is 1245447703. The next prime is 1245447737. The reversal of 1245447713 is 3177445421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3177445421 = 3163 ⋅1004567.

It can be written as a sum of positive squares in 2 ways, for example, as 485453089 + 759994624 = 22033^2 + 27568^2 .

It is a cyclic number.

It is not a de Polignac number, because 1245447713 - 2⁶ = 1245447649 is a prime.

It is a super-2 number, since 2×1245447713² = 3102280011633860738, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1245447703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16830338 + ... + 16830411.

It is an arithmetic number, because the mean of its divisors is an integer number (319777125).

Almost surely, 2^1245447713 is an apocalyptic number.

It is an amenable number.

1245447713 is a deficient number, since it is larger than the sum of its proper divisors (33660787).

1245447713 is an equidigital number, since it uses as much as digits as its factorization.

1245447713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33660786.

The product of its digits is 94080, while the sum is 38.

The square root of 1245447713 is about 35290.9012778081. The cubic root of 1245447713 is about 1075.9080736754.

The spelling of 1245447713 in words is "one billion, two hundred forty-five million, four hundred forty-seven thousand, seven hundred thirteen".