1299959 has 4 divisors (see below), whose sum is σ = 1308720. Its totient is φ = 1291200.

The previous prime is 1299953. The next prime is 1299979. The reversal of 1299959 is 9599921.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1299959 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 (1299953) 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, 4154 + ... + 4455.

It is an arithmetic number, because the mean of its divisors is an integer number (327180).

2^1299959 is an apocalyptic number.

1299959 is a deficient number, since it is larger than the sum of its proper divisors (8761).

1299959 is an equidigital number, since it uses as much as digits as its factorization.

1299959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8760.

The product of its digits is 65610, while the sum is 44.

The square root of 1299959 is about 1140.1574452680. The cubic root of 1299959 is about 109.1381409323.

It can be divided in two parts, 12999 and 59, that multiplied together give a triangular number (766941 = T₁₂₃₈).

The spelling of 1299959 in words is "one million, two hundred ninety-nine thousand, nine hundred fifty-nine".