1427205857 has 32 divisors (see below), whose sum is σ = 1804218624. Its totient is φ = 1096704000.

The previous prime is 1427205823. The next prime is 1427205953. The reversal of 1427205857 is 7585027241.

It is not a de Polignac number, because 1427205857 - 2¹⁰ = 1427204833 is a prime.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1427205817) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2035607 + ... + 2036307.

It is an arithmetic number, because the mean of its divisors is an integer number (56381832).

Almost surely, 2^1427205857 is an apocalyptic number.

It is an amenable number.

1427205857 is a deficient number, since it is larger than the sum of its proper divisors (377012767).

1427205857 is a wasteful number, since it uses less digits than its factorization.

1427205857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1049.

The product of its (nonzero) digits is 156800, while the sum is 41.

The square root of 1427205857 is about 37778.3781679415. The cubic root of 1427205857 is about 1125.8889058842. Note that the first 3 decimals are identical.

The spelling of 1427205857 in words is "one billion, four hundred twenty-seven million, two hundred five thousand, eight hundred fifty-seven".