101002500 has 135 divisors (see below), whose sum is σ = 323870547.
Its totient is φ = 26532000.
The previous prime is 101002493. The next prime is 101002501. The reversal of 101002500 is 5200101.
Adding to 101002500 its reverse (5200101), we get a palindrome (106202601).
It is a happy number.
The square root of 101002500 is 10050.
It is a perfect power (a square), and thus also a powerful number.
It can be written as a sum of positive squares in 2 ways, for example, as 7918596 + 93083904 = 2814^2 + 9648^2
It is a Harshad number since it is a multiple of its sum of digits (9).
It is not an unprimeable number, because it can be changed into a prime (101002501) by changing a digit.
It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 1507467 + ... + 1507533.
Almost surely, 2101002500 is an apocalyptic number.
101002500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.
101002500 is the 10050-th square number.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 101002500
101002500 is an abundant number, since it is smaller than the sum of its proper divisors (222868047).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
101002500 is an equidigital number, since it uses as much as digits as its factorization.
101002500 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 164 (or 77 counting only the distinct ones).
The product of its (nonzero) digits is 10, while the sum is 9.
The cubic root of 101002500 is about 465.7047931658.
The spelling of 101002500 in words is "one hundred one million, two thousand, five hundred".