100261509 has 8 divisors (see below), whose sum is σ = 136791072. Its totient is φ = 65286480.

The previous prime is 100261489. The next prime is 100261517. The reversal of 100261509 is 905162001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 100261509 - 2¹⁵ = 100228741 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100261519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 388482 + ... + 388739.

It is an arithmetic number, because the mean of its divisors is an integer number (17098884).

Almost surely, 2^100261509 is an apocalyptic number.

It is an amenable number.

100261509 is a deficient number, since it is larger than the sum of its proper divisors (36529563).

100261509 is an equidigital number, since it uses as much as digits as its factorization.

100261509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 777267.

The product of its (nonzero) digits is 540, while the sum is 24.

The square root of 100261509 is about 10013.0669127895. The cubic root of 100261509 is about 464.5631369307.

The spelling of 100261509 in words is "one hundred million, two hundred sixty-one thousand, five hundred nine".