541457821 has 2 divisors, whose sum is σ = 541457822. Its totient is φ = 541457820.

The previous prime is 541457773. The next prime is 541457831. The reversal of 541457821 is 128754145.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 338964921 + 202492900 = 18411^2 + 14230^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-541457821 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (541457831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 270728910 + 270728911.

It is an arithmetic number, because the mean of its divisors is an integer number (270728911).

Almost surely, 2^541457821 is an apocalyptic number.

It is an amenable number.

541457821 is a deficient number, since it is larger than the sum of its proper divisors (1).

541457821 is an equidigital number, since it uses as much as digits as its factorization.

541457821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 44800, while the sum is 37.

The square root of 541457821 is about 23269.2462490730. The cubic root of 541457821 is about 815.0574293028.

The spelling of 541457821 in words is "five hundred forty-one million, four hundred fifty-seven thousand, eight hundred twenty-one".