1293889 has 4 divisors (see below), whose sum is σ = 1318356. Its totient is φ = 1269424.

The previous prime is 1293869. The next prime is 1293899. The reversal of 1293889 is 9883921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9883921 = 37 ⋅267133.

It can be written as a sum of positive squares in 2 ways, for example, as 588289 + 705600 = 767^2 + 840^2 .

It is a cyclic number.

It is not a de Polignac number, because 1293889 - 2⁵ = 1293857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1293829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12154 + ... + 12259.

It is an arithmetic number, because the mean of its divisors is an integer number (329589).

2^1293889 is an apocalyptic number.

It is an amenable number.

1293889 is a deficient number, since it is larger than the sum of its proper divisors (24467).

1293889 is an equidigital number, since it uses as much as digits as its factorization.

1293889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24466.

The product of its digits is 31104, while the sum is 40.

The square root of 1293889 is about 1137.4924175571. The cubic root of 1293889 is about 108.9680067707.

The spelling of 1293889 in words is "one million, two hundred ninety-three thousand, eight hundred eighty-nine".