541521121 has 2 divisors, whose sum is σ = 541521122. Its totient is φ = 541521120.

The previous prime is 541521107. The next prime is 541521151. The reversal of 541521121 is 121125145.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 456420496 + 85100625 = 21364^2 + 9225^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-541521121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 541521092 and 541521101.

It is not a weakly prime, because it can be changed into another prime (541521151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 270760560 + 270760561.

It is an arithmetic number, because the mean of its divisors is an integer number (270760561).

Almost surely, 2^541521121 is an apocalyptic number.

It is an amenable number.

541521121 is a deficient number, since it is larger than the sum of its proper divisors (1).

541521121 is an equidigital number, since it uses as much as digits as its factorization.

541521121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 400, while the sum is 22.

The square root of 541521121 is about 23270.6063737067. The cubic root of 541521121 is about 815.0891899330.

Adding to 541521121 its reverse (121125145), we get a palindrome (662646266).

The spelling of 541521121 in words is "five hundred forty-one million, five hundred twenty-one thousand, one hundred twenty-one".