1299745 has 4 divisors (see below), whose sum is σ = 1559700. Its totient is φ = 1039792.

The previous prime is 1299743. The next prime is 1299763. The reversal of 1299745 is 5479921.

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 732736 + 567009 = 856^2 + 753^2 .

It is a cyclic number.

It is not a de Polignac number, because 1299745 - 2¹ = 1299743 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1299743) 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, 129970 + ... + 129979.

It is an arithmetic number, because the mean of its divisors is an integer number (389925).

2^1299745 is an apocalyptic number.

It is an amenable number.

1299745 is a deficient number, since it is larger than the sum of its proper divisors (259955).

1299745 is an equidigital number, since it uses as much as digits as its factorization.

1299745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259954.

The product of its digits is 22680, while the sum is 37.

The square root of 1299745 is about 1140.0635947174. The cubic root of 1299745 is about 109.1321518091.

The spelling of 1299745 in words is "one million, two hundred ninety-nine thousand, seven hundred forty-five".