1025504400 has 60 divisors (see below), whose sum is σ = 3285036272. Its totient is φ = 273467520.

The previous prime is 1025504393. The next prime is 1025504401. The reversal of 1025504400 is 44055201.

It is a tau number, because it is divible by the number of its divisors (60).

It is not an unprimeable number, because it can be changed into a prime (1025504401) 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 11 ways as a sum of consecutive naturals, for example, 426094 + ... + 428493.

Almost surely, 2^1025504400 is an apocalyptic number.

1025504400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1025504400 is an abundant number, since it is smaller than the sum of its proper divisors (2259531872).

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

1025504400 is a wasteful number, since it uses less digits than its factorization.

1025504400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 854608 (or 854597 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 1025504400 is about 32023.4976228394. The cubic root of 1025504400 is about 1008.4301987099.

Adding to 1025504400 its reverse (44055201), we get a palindrome (1069559601).

The spelling of 1025504400 in words is "one billion, twenty-five million, five hundred four thousand, four hundred".