15998601 has 8 divisors (see below), whose sum is σ = 21473344. Its totient is φ = 10594800.

The previous prime is 15998599. The next prime is 15998621. The reversal of 15998601 is 10689951.

15998601 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 15998601 - 2¹ = 15998599 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 15998601.

It is not an unprimeable number, because it can be changed into a prime (15998621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17206 + ... + 18111.

It is an arithmetic number, because the mean of its divisors is an integer number (2684168).

Almost surely, 2^15998601 is an apocalyptic number.

It is an amenable number.

15998601 is a deficient number, since it is larger than the sum of its proper divisors (5474743).

15998601 is a wasteful number, since it uses less digits than its factorization.

15998601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35471.

The product of its (nonzero) digits is 19440, while the sum is 39.

The square root of 15998601 is about 3999.8251211772. The cubic root of 15998601 is about 251.9768654751.

The spelling of 15998601 in words is "fifteen million, nine hundred ninety-eight thousand, six hundred one".