1427001289 has 32 divisors (see below), whose sum is σ = 1782144000. Its totient is φ = 1114876224.

The previous prime is 1427001283. The next prime is 1427001313. The reversal of 1427001289 is 9821007241.

It is not a de Polignac number, because 1427001289 - 2³ = 1427001281 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1427001281) 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, 1615642 + ... + 1616524.

It is an arithmetic number, because the mean of its divisors is an integer number (55692000).

Almost surely, 2^1427001289 is an apocalyptic number.

1427001289 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1427001289 is a deficient number, since it is larger than the sum of its proper divisors (355142711).

1427001289 is a wasteful number, since it uses less digits than its factorization.

1427001289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1357.

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 1427001289 is about 37775.6705962978. The cubic root of 1427001289 is about 1125.8351103634.

The spelling of 1427001289 in words is "one billion, four hundred twenty-seven million, one thousand, two hundred eighty-nine".