1229825855 has 4 divisors (see below), whose sum is σ = 1475791032. Its totient is φ = 983860680.

The previous prime is 1229825837. The next prime is 1229825879. The reversal of 1229825855 is 5585289221.

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

It is not a de Polignac number, because 1229825855 - 2¹⁰ = 1229824831 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122982581 + ... + 122982590.

It is an arithmetic number, because the mean of its divisors is an integer number (368947758).

Almost surely, 2^1229825855 is an apocalyptic number.

1229825855 is a deficient number, since it is larger than the sum of its proper divisors (245965177).

1229825855 is an equidigital number, since it uses as much as digits as its factorization.

1229825855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245965176.

The product of its digits is 576000, while the sum is 47.

The square root of 1229825855 is about 35068.8730215272. The cubic root of 1229825855 is about 1071.3907019546.

The spelling of 1229825855 in words is "one billion, two hundred twenty-nine million, eight hundred twenty-five thousand, eight hundred fifty-five".