101487721 has 8 divisors (see below), whose sum is σ = 106984800. Its totient is φ = 96006240.

The previous prime is 101487719. The next prime is 101487731. The reversal of 101487721 is 127784101.

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

It is not a de Polignac number, because 101487721 - 2¹ = 101487719 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101487731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10950 + ... + 17968.

It is an arithmetic number, because the mean of its divisors is an integer number (13373100).

Almost surely, 2^101487721 is an apocalyptic number.

It is an amenable number.

101487721 is a deficient number, since it is larger than the sum of its proper divisors (5497079).

101487721 is an equidigital number, since it uses as much as digits as its factorization.

101487721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7799.

The product of its (nonzero) digits is 3136, while the sum is 31.

The square root of 101487721 is about 10074.1114248354. Note that the first 3 decimals coincide. The cubic root of 101487721 is about 466.4493584043.

The spelling of 101487721 in words is "one hundred one million, four hundred eighty-seven thousand, seven hundred twenty-one".