1285197829 has 8 divisors (see below), whose sum is σ = 1353199680. Its totient is φ = 1217232000.

The previous prime is 1285197769. The next prime is 1285197839. The reversal of 1285197829 is 9287915821.

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 1285197829 - 2⁹ = 1285197317 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 (1285197839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95349 + ... + 107989.

It is an arithmetic number, because the mean of its divisors is an integer number (169149960).

Almost surely, 2^1285197829 is an apocalyptic number.

1285197829 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1285197829 is a deficient number, since it is larger than the sum of its proper divisors (68001851).

1285197829 is a wasteful number, since it uses less digits than its factorization.

1285197829 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18011.

The product of its digits is 725760, while the sum is 52.

The square root of 1285197829 is about 35849.6559118773. The cubic root of 1285197829 is about 1087.2347574200.

The spelling of 1285197829 in words is "one billion, two hundred eighty-five million, one hundred ninety-seven thousand, eight hundred twenty-nine".