442621541 has 2 divisors, whose sum is σ = 442621542. Its totient is φ = 442621540.

The previous prime is 442621523. The next prime is 442621559. The reversal of 442621541 is 145126244.

It is a balanced prime because it is at equal distance from previous prime (442621523) and next prime (442621559).

It can be written as a sum of positive squares in only one way, i.e., 244797316 + 197824225 = 15646^2 + 14065^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-442621541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (442621841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221310770 + 221310771.

It is an arithmetic number, because the mean of its divisors is an integer number (221310771).

Almost surely, 2^442621541 is an apocalyptic number.

It is an amenable number.

442621541 is a deficient number, since it is larger than the sum of its proper divisors (1).

442621541 is an equidigital number, since it uses as much as digits as its factorization.

442621541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7680, while the sum is 29.

The square root of 442621541 is about 21038.5726939828. The cubic root of 442621541 is about 762.0980468947.

Adding to 442621541 its reverse (145126244), we get a palindrome (587747785).

The spelling of 442621541 in words is "four hundred forty-two million, six hundred twenty-one thousand, five hundred forty-one".