201546 has 12 divisors (see below), whose sum is σ = 436722. Its totient is φ = 67176.

The previous prime is 201517. The next prime is 201547. The reversal of 201546 is 645102.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 189225 + 12321 = 435^2 + 111^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 11197 = 201546 / (2 + 0 + 1 + 5 + 4 + 6).

It is a nialpdrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (201547) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5581 + ... + 5616.

2²⁰¹⁵⁴⁶ is an apocalyptic number.

201546 is an abundant number, since it is smaller than the sum of its proper divisors (235176).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

201546 is a wasteful number, since it uses less digits than its factorization.

201546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11205 (or 11202 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 201546 is about 448.9387486061. The cubic root of 201546 is about 58.6306525404.

Adding to 201546 its reverse (645102), we get a palindrome (846648).

Subtracting 201546 from its reverse (645102), we obtain a square (443556 = 666²).

It can be divided in two parts, 201 and 546, that multiplied together give a triangular number (109746 = T₄₆₈).

The spelling of 201546 in words is "two hundred one thousand, five hundred forty-six".