1285234898 has 32 divisors (see below), whose sum is σ = 2058963840. Its totient is φ = 599961600.

The previous prime is 1285234897. The next prime is 1285234957. The reversal of 1285234898 is 8984325821.

It is not an unprimeable number, because it can be changed into a prime (1285234891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 985715 + ... + 987017.

It is an arithmetic number, because the mean of its divisors is an integer number (64342620).

Almost surely, 2^1285234898 is an apocalyptic number.

1285234898 is a deficient number, since it is larger than the sum of its proper divisors (773728942).

1285234898 is a wasteful number, since it uses less digits than its factorization.

1285234898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1682.

The product of its digits is 1105920, while the sum is 50.

The square root of 1285234898 is about 35850.1729145063. The cubic root of 1285234898 is about 1087.2452103679.

The spelling of 1285234898 in words is "one billion, two hundred eighty-five million, two hundred thirty-four thousand, eight hundred ninety-eight".