201541421 has 4 divisors (see below), whose sum is σ = 201619932. Its totient is φ = 201462912.

The previous prime is 201541411. The next prime is 201541451. The reversal of 201541421 is 124145102.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 68392900 + 133148521 = 8270^2 + 11539^2 .

It is a cyclic number.

It is not a de Polignac number, because 201541421 - 2⁶ = 201541357 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201541393 and 201541402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201541411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35270 + ... + 40583.

It is an arithmetic number, because the mean of its divisors is an integer number (50404983).

Almost surely, 2^201541421 is an apocalyptic number.

It is an amenable number.

201541421 is a deficient number, since it is larger than the sum of its proper divisors (78511).

201541421 is an equidigital number, since it uses as much as digits as its factorization.

201541421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78510.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 201541421 is about 14196.5284841048. The cubic root of 201541421 is about 586.3020851974.

Adding to 201541421 its reverse (124145102), we get a palindrome (325686523).

The spelling of 201541421 in words is "two hundred one million, five hundred forty-one thousand, four hundred twenty-one".