1025555200 has 54 divisors (see below), whose sum is σ = 2538425204. Its totient is φ = 410219520.

The previous prime is 1025555197. The next prime is 1025555249. The reversal of 1025555200 is 25555201.

1025555200 = T₅₁₉₂ + T₅₁₉₃ + ... + T₅₂₆₆.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 73722 + ... + 86521.

Almost surely, 2^1025555200 is an apocalyptic number.

1025555200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1025555200 is an abundant number, since it is smaller than the sum of its proper divisors (1512870004).

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

1025555200 is an equidigital number, since it uses as much as digits as its factorization.

1025555200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160269 (or 160250 counting only the distinct ones).

The product of its (nonzero) digits is 2500, while the sum is 25.

The square root of 1025555200 is about 32024.2907805934. The cubic root of 1025555200 is about 1008.4468498357.

Subtracting from 1025555200 its reverse (25555201), we obtain a palindrome (999999999).

The spelling of 1025555200 in words is "one billion, twenty-five million, five hundred fifty-five thousand, two hundred".