201501 has 16 divisors (see below), whose sum is σ = 316800. Its totient is φ = 126144.

The previous prime is 201499. The next prime is 201511. The reversal of 201501 is 105102.

It is a happy number.

201501 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 201501 - 2¹ = 201499 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 240 + ... + 678.

It is an arithmetic number, because the mean of its divisors is an integer number (19800).

2²⁰¹⁵⁰¹ is an apocalyptic number.

It is an amenable number.

201501 is a deficient number, since it is larger than the sum of its proper divisors (115299).

201501 is a wasteful number, since it uses less digits than its factorization.

201501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 465 (or 459 counting only the distinct ones).

The product of its (nonzero) digits is 10, while the sum is 9.

The square root of 201501 is about 448.8886276127. Note that the first 3 decimals coincide. The cubic root of 201501 is about 58.6262886471.

Adding to 201501 its reverse (105102), we get a palindrome (306603).

It can be divided in two parts, 20 and 1501, that added together give a square (1521 = 39²).

The spelling of 201501 in words is "two hundred one thousand, five hundred one".