1001252500 has 120 divisors (see below), whose sum is σ = 2338126560. Its totient is φ = 373968000.

The previous prime is 1001252471. The next prime is 1001252503. The reversal of 1001252500 is 52521001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001252503) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 5082402 + ... + 5082598.

It is an arithmetic number, because the mean of its divisors is an integer number (19484388).

Almost surely, 2^1001252500 is an apocalyptic number.

1001252500 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 1001252500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1169063280).

1001252500 is an abundant number, since it is smaller than the sum of its proper divisors (1336874060).

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

1001252500 is a wasteful number, since it uses less digits than its factorization.

1001252500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347 (or 330 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 1001252500 is about 31642.5741683574. The cubic root of 1001252500 is about 1000.4173258149.

Adding to 1001252500 its reverse (52521001), we get a palindrome (1053773501).

The spelling of 1001252500 in words is "one billion, one million, two hundred fifty-two thousand, five hundred".