1299729 has 8 divisors (see below), whose sum is σ = 1749600. Its totient is φ = 858176.

The previous prime is 1299721. The next prime is 1299743. The reversal of 1299729 is 9279921.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1299729 - 2³ = 1299721 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1299721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1704 + ... + 2345.

It is an arithmetic number, because the mean of its divisors is an integer number (218700).

2^1299729 is an apocalyptic number.

It is an amenable number.

1299729 is a deficient number, since it is larger than the sum of its proper divisors (449871).

1299729 is a wasteful number, since it uses less digits than its factorization.

1299729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4159.

The product of its digits is 20412, while the sum is 39.

The square root of 1299729 is about 1140.0565775434. The cubic root of 1299729 is about 109.1317039978.

The spelling of 1299729 in words is "one million, two hundred ninety-nine thousand, seven hundred twenty-nine".