1025599128 has 32 divisors (see below), whose sum is σ = 2594894400. Its totient is φ = 337746848.

The previous prime is 1025599121. The next prime is 1025599193. The reversal of 1025599128 is 8219955201.

It is a self number, because there is not a number n which added to its sum of digits gives 1025599128.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1025599121) 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, 255438 + ... + 259421.

It is an arithmetic number, because the mean of its divisors is an integer number (81090450).

Almost surely, 2^1025599128 is an apocalyptic number.

It is an amenable number.

1025599128 is an abundant number, since it is smaller than the sum of its proper divisors (1569295272).

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

1025599128 is a wasteful number, since it uses less digits than its factorization.

1025599128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 514951 (or 514947 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 42.

The square root of 1025599128 is about 32024.9766276261. The cubic root of 1025599128 is about 1008.4612480272.

The spelling of 1025599128 in words is "one billion, twenty-five million, five hundred ninety-nine thousand, one hundred twenty-eight".