1025851280 has 20 divisors (see below), whose sum is σ = 2385104412. Its totient is φ = 410340480.

The previous prime is 1025851279. The next prime is 1025851289. The reversal of 1025851280 is 821585201.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 568917904 + 456933376 = 23852^2 + 21376^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (1025851289) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6411491 + ... + 6411650.

Almost surely, 2^1025851280 is an apocalyptic number.

1025851280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1025851280 is an abundant number, since it is smaller than the sum of its proper divisors (1359253132).

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

1025851280 is a wasteful number, since it uses less digits than its factorization.

1025851280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12823154 (or 12823148 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 32.

The square root of 1025851280 is about 32028.9131879307. The cubic root of 1025851280 is about 1008.5438874254.

The spelling of 1025851280 in words is "one billion, twenty-five million, eight hundred fifty-one thousand, two hundred eighty".