1285492398 has 16 divisors (see below), whose sum is σ = 2574660816. Its totient is φ = 427884800.

The previous prime is 1285492381. The next prime is 1285492399. The reversal of 1285492398 is 8932945821.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1285492398.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1285492399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 148611 + ... + 157022.

It is an arithmetic number, because the mean of its divisors is an integer number (160916301).

Almost surely, 2^1285492398 is an apocalyptic number.

1285492398 is an abundant number, since it is smaller than the sum of its proper divisors (1289168418).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1285492398 is a wasteful number, since it uses less digits than its factorization.

1285492398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306339.

The product of its digits is 1244160, while the sum is 51.

The square root of 1285492398 is about 35853.7640701782. The cubic root of 1285492398 is about 1087.3178162775.

The spelling of 1285492398 in words is "one billion, two hundred eighty-five million, four hundred ninety-two thousand, three hundred ninety-eight".