1228525879 has 8 divisors (see below), whose sum is σ = 1404335520. Its totient is φ = 1052792736.

The previous prime is 1228525817. The next prime is 1228525889. The reversal of 1228525879 is 9785258221.

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 1228525879 - 2⁷ = 1228525751 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1228525889) 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, 20877 + ... + 53785.

It is an arithmetic number, because the mean of its divisors is an integer number (175541940).

Almost surely, 2^1228525879 is an apocalyptic number.

1228525879 is a deficient number, since it is larger than the sum of its proper divisors (175809641).

1228525879 is an equidigital number, since it uses as much as digits as its factorization.

1228525879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38249.

The product of its digits is 806400, while the sum is 49.

The square root of 1228525879 is about 35050.3335076858. Note that the first 3 decimals coincide. The cubic root of 1228525879 is about 1071.0130676675.

The spelling of 1228525879 in words is "one billion, two hundred twenty-eight million, five hundred twenty-five thousand, eight hundred seventy-nine".