1427247785 has 4 divisors (see below), whose sum is σ = 1712697348. Its totient is φ = 1141798224.

The previous prime is 1427247769. The next prime is 1427247793. The reversal of 1427247785 is 5877427241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5877427241 = 7 ⋅839632463.

It can be written as a sum of positive squares in 2 ways, for example, as 1005397264 + 421850521 = 31708^2 + 20539^2 .

It is a cyclic number.

It is not a de Polignac number, because 1427247785 - 2⁴ = 1427247769 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 142724774 + ... + 142724783.

It is an arithmetic number, because the mean of its divisors is an integer number (428174337).

Almost surely, 2^1427247785 is an apocalyptic number.

It is an amenable number.

1427247785 is a deficient number, since it is larger than the sum of its proper divisors (285449563).

1427247785 is an equidigital number, since it uses as much as digits as its factorization.

1427247785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285449562.

The product of its digits is 878080, while the sum is 47.

The square root of 1427247785 is about 37778.9330844586. The cubic root of 1427247785 is about 1125.8999311117.

The spelling of 1427247785 in words is "one billion, four hundred twenty-seven million, two hundred forty-seven thousand, seven hundred eighty-five".