1275389 has 4 divisors (see below), whose sum is σ = 1279356. Its totient is φ = 1271424.

The previous prime is 1275361. The next prime is 1275401. The reversal of 1275389 is 9835721.

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 156025 + 1119364 = 395^2 + 1058^2 .

It is a cyclic number.

It is not a de Polignac number, because 1275389 - 2⁸ = 1275133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1275319) by changing a digit.

It is an upside-down number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1454 + ... + 2159.

It is an arithmetic number, because the mean of its divisors is an integer number (319839).

2^1275389 is an apocalyptic number.

It is an amenable number.

1275389 is a deficient number, since it is larger than the sum of its proper divisors (3967).

1275389 is an equidigital number, since it uses as much as digits as its factorization.

1275389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3966.

The product of its digits is 15120, while the sum is 35.

The square root of 1275389 is about 1129.3312180224. The cubic root of 1275389 is about 108.4461709245.

The spelling of 1275389 in words is "one million, two hundred seventy-five thousand, three hundred eighty-nine".