1270289 has 4 divisors (see below), whose sum is σ = 1272756. Its totient is φ = 1267824.

The previous prime is 1270279. The next prime is 1270301. The reversal of 1270289 is 9820721.

It is a happy number.

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 984064 + 286225 = 992^2 + 535^2 .

It is a cyclic number.

It is not a de Polignac number, because 1270289 - 2⁸ = 1270033 is a prime.

It is a super-2 number, since 2×1270289² = 3227268287042, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1270249) 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, 134 + ... + 1599.

It is an arithmetic number, because the mean of its divisors is an integer number (318189).

2^1270289 is an apocalyptic number.

It is an amenable number.

1270289 is a deficient number, since it is larger than the sum of its proper divisors (2467).

1270289 is an equidigital number, since it uses as much as digits as its factorization.

1270289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2466.

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 1270289 is about 1127.0709826803. The cubic root of 1270289 is about 108.3014270273.

The spelling of 1270289 in words is "one million, two hundred seventy thousand, two hundred eighty-nine".