100621260 has 72 divisors (see below), whose sum is σ = 306161856. Its totient is φ = 26749440.

The previous prime is 100621259. The next prime is 100621267. The reversal of 100621260 is 62126001.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (100621267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 76932 + ... + 78228.

It is an arithmetic number, because the mean of its divisors is an integer number (4252248).

Almost surely, 2^100621260 is an apocalyptic number.

100621260 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 100621260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (153080928).

100621260 is an abundant number, since it is smaller than the sum of its proper divisors (205540596).

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

100621260 is a wasteful number, since it uses less digits than its factorization.

100621260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1743 (or 1738 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 100621260 is about 10031.0149037872. The cubic root of 100621260 is about 465.1181108226.

Adding to 100621260 its reverse (62126001), we get a palindrome (162747261).

The spelling of 100621260 in words is "one hundred million, six hundred twenty-one thousand, two hundred sixty".