42153541 has 2 divisors, whose sum is σ = 42153542. Its totient is φ = 42153540.

The previous prime is 42153493. The next prime is 42153563. The reversal of 42153541 is 14535124.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23912100 + 18241441 = 4890^2 + 4271^2 .

It is a cyclic number.

It is not a de Polignac number, because 42153541 - 2⁷ = 42153413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42103541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21076770 + 21076771.

It is an arithmetic number, because the mean of its divisors is an integer number (21076771).

Almost surely, 2^42153541 is an apocalyptic number.

It is an amenable number.

42153541 is a deficient number, since it is larger than the sum of its proper divisors (1).

42153541 is an equidigital number, since it uses as much as digits as its factorization.

42153541 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2400, while the sum is 25.

The square root of 42153541 is about 6492.5758370619. The cubic root of 42153541 is about 348.0257308010.

Adding to 42153541 its reverse (14535124), we get a palindrome (56688665).

The spelling of 42153541 in words is "forty-two million, one hundred fifty-three thousand, five hundred forty-one".