201490 has 8 divisors (see below), whose sum is σ = 362700. Its totient is φ = 80592.

The previous prime is 201473. The next prime is 201491. The reversal of 201490 is 94102.

It can be written as a sum of positive squares in 2 ways, for example, as 199809 + 1681 = 447^2 + 41^2 .

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

It is not an unprimeable number, because it can be changed into a prime (201491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10065 + ... + 10084.

2²⁰¹⁴⁹⁰ is an apocalyptic number.

201490 is a deficient number, since it is larger than the sum of its proper divisors (161210).

201490 is a wasteful number, since it uses less digits than its factorization.

201490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20156.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 201490 is about 448.8763749631. The cubic root of 201490 is about 58.6252218188.

Adding to 201490 its reverse (94102), we get a palindrome (295592).

The spelling of 201490 in words is "two hundred one thousand, four hundred ninety".