1427317565 has 4 divisors (see below), whose sum is σ = 1712781084. Its totient is φ = 1141854048.

The previous prime is 1427317561. The next prime is 1427317571. The reversal of 1427317565 is 5657137241.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 543682489 + 883635076 = 23317^2 + 29726^2 .

It is a cyclic number.

It is not a de Polignac number, because 1427317565 - 2² = 1427317561 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 (1427317561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 142731752 + ... + 142731761.

It is an arithmetic number, because the mean of its divisors is an integer number (428195271).

Almost surely, 2^1427317565 is an apocalyptic number.

It is an amenable number.

1427317565 is a deficient number, since it is larger than the sum of its proper divisors (285463519).

1427317565 is an equidigital number, since it uses as much as digits as its factorization.

1427317565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285463518.

The product of its digits is 176400, while the sum is 41.

The square root of 1427317565 is about 37779.8566037512. The cubic root of 1427317565 is about 1125.9182797165.

The spelling of 1427317565 in words is "one billion, four hundred twenty-seven million, three hundred seventeen thousand, five hundred sixty-five".