1299871 has 4 divisors (see below), whose sum is σ = 1376352. Its totient is φ = 1223392.

The previous prime is 1299869. The next prime is 1299877. The reversal of 1299871 is 1789921.

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

It is a cyclic number.

It is not a de Polignac number, because 1299871 - 2¹ = 1299869 is a prime.

It is a Duffinian number.

1299871 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1299871.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1299877) 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, 38215 + ... + 38248.

It is an arithmetic number, because the mean of its divisors is an integer number (344088).

2^1299871 is an apocalyptic number.

1299871 is a deficient number, since it is larger than the sum of its proper divisors (76481).

1299871 is an equidigital number, since it uses as much as digits as its factorization.

1299871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76480.

The product of its digits is 9072, while the sum is 37.

The square root of 1299871 is about 1140.1188534534. The cubic root of 1299871 is about 109.1356781949.

It can be divided in two parts, 129 and 9871, that added together give a 4-th power (10000 = 10⁴).

The spelling of 1299871 in words is "one million, two hundred ninety-nine thousand, eight hundred seventy-one".