1297829 has 4 divisors (see below), whose sum is σ = 1397676. Its totient is φ = 1197984.

The previous prime is 1297799. The next prime is 1297841. The reversal of 1297829 is 9287921.

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 277729 + 1020100 = 527^2 + 1010^2 .

It is a cyclic number.

It is not a de Polignac number, because 1297829 - 2⁸ = 1297573 is a prime.

It is a super-2 number, since 2×1297829² = 3368720226482, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1297792 and 1297801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1297129) 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, 49904 + ... + 49929.

It is an arithmetic number, because the mean of its divisors is an integer number (349419).

2^1297829 is an apocalyptic number.

It is an amenable number.

1297829 is a deficient number, since it is larger than the sum of its proper divisors (99847).

1297829 is an equidigital number, since it uses as much as digits as its factorization.

1297829 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99846.

The product of its digits is 18144, while the sum is 38.

The square root of 1297829 is about 1139.2229808075. Note that the first 3 decimals coincide. The cubic root of 1297829 is about 109.0785002510.

The spelling of 1297829 in words is "one million, two hundred ninety-seven thousand, eight hundred twenty-nine".