1289271 has 8 divisors (see below), whose sum is σ = 1725184. Its totient is φ = 856440.

The previous prime is 1289261. The next prime is 1289273. The reversal of 1289271 is 1729821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1289271 - 2¹⁰ = 1288247 is a prime.

It is a super-2 number, since 2×1289271² = 3324439422882, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1289273) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 516 + ... + 1686.

It is an arithmetic number, because the mean of its divisors is an integer number (215648).

2^1289271 is an apocalyptic number.

1289271 is a deficient number, since it is larger than the sum of its proper divisors (435913).

1289271 is a wasteful number, since it uses less digits than its factorization.

1289271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1541.

The product of its digits is 2016, while the sum is 30.

The square root of 1289271 is about 1135.4606994520. The cubic root of 1289271 is about 108.8382135358.

The spelling of 1289271 in words is "one million, two hundred eighty-nine thousand, two hundred seventy-one".