1427178085 has 4 divisors (see below), whose sum is σ = 1712613708. Its totient is φ = 1141742464.

The previous prime is 1427178043. The next prime is 1427178089. The reversal of 1427178085 is 5808717241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5808717241 = 6089 ⋅953969.

It can be written as a sum of positive squares in 2 ways, for example, as 448677124 + 978500961 = 21182^2 + 31281^2 .

It is a cyclic number.

It is not a de Polignac number, because 1427178085 - 2⁹ = 1427177573 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1427178089) 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, 142717804 + ... + 142717813.

It is an arithmetic number, because the mean of its divisors is an integer number (428153427).

Almost surely, 2^1427178085 is an apocalyptic number.

It is an amenable number.

1427178085 is a deficient number, since it is larger than the sum of its proper divisors (285435623).

1427178085 is an equidigital number, since it uses as much as digits as its factorization.

1427178085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285435622.

The product of its (nonzero) digits is 125440, while the sum is 43.

The square root of 1427178085 is about 37778.0106014067. The cubic root of 1427178085 is about 1125.8816029457.

The spelling of 1427178085 in words is "one billion, four hundred twenty-seven million, one hundred seventy-eight thousand, eighty-five".