1025322500 has 60 divisors (see below), whose sum is σ = 2250676428. Its totient is φ = 408576000.

The previous prime is 1025322457. The next prime is 1025322511. The reversal of 1025322500 is 52235201.

It can be written as a sum of positive squares in 10 ways, for example, as 936849664 + 88472836 = 30608^2 + 9406^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 841892 + ... + 843108.

Almost surely, 2^1025322500 is an apocalyptic number.

1025322500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1025322500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1125338214).

1025322500 is an abundant number, since it is smaller than the sum of its proper divisors (1225353928).

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

1025322500 is a wasteful number, since it uses less digits than its factorization.

1025322500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1578 (or 1561 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 1025322500 is about 32020.6573948756. The cubic root of 1025322500 is about 1008.3705713695.

Adding to 1025322500 its reverse (52235201), we get a palindrome (1077557701).

The spelling of 1025322500 in words is "one billion, twenty-five million, three hundred twenty-two thousand, five hundred".