10169721 has 9 divisors (see below), whose sum is σ = 14703429.
Its totient is φ = 6773436.
The previous prime is 10169713. The next prime is 10169743. The reversal of 10169721 is 12796101.
The square root of 10169721 is 3189.
It is a perfect power (a square), and thus also a powerful number.
It is a tau number, because it is divible by the number of its divisors (9).
It is not a de Polignac number, because 10169721 - 23 = 10169713 is a prime.
It is not an unprimeable number, because it can be changed into a prime (10169021) by changing a digit.
It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 9036 + ... + 10098.
Almost surely, 210169721 is an apocalyptic number.
10169721 is the 3189-th square number.
10169721 is the 1595-th centered octagonal number.
It is an amenable number.
10169721 is a deficient number, since it is larger than the sum of its proper divisors (4533708).
10169721 is an frugal number, since it uses more digits than its factorization.
10169721 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 2132 (or 1066 counting only the distinct ones).
The product of its (nonzero) digits is 756, while the sum is 27.
The cubic root of 10169721 is about 216.6554805533.
The spelling of 10169721 in words is "ten million, one hundred sixty-nine thousand, seven hundred twenty-one".