42581153 has 2 divisors, whose sum is σ = 42581154. Its totient is φ = 42581152.

The previous prime is 42581129. The next prime is 42581171. The reversal of 42581153 is 35118524.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40094224 + 2486929 = 6332^2 + 1577^2 .

It is a cyclic number.

It is not a de Polignac number, because 42581153 - 2⁸ = 42580897 is a prime.

It is not a weakly prime, because it can be changed into another prime (42581173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21290576 + 21290577.

It is an arithmetic number, because the mean of its divisors is an integer number (21290577).

Almost surely, 2^42581153 is an apocalyptic number.

It is an amenable number.

42581153 is a deficient number, since it is larger than the sum of its proper divisors (1).

42581153 is an equidigital number, since it uses as much as digits as its factorization.

42581153 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4800, while the sum is 29.

The square root of 42581153 is about 6525.4235877834. The cubic root of 42581153 is about 349.1985826708.

Adding to 42581153 its reverse (35118524), we get a palindrome (77699677).

The spelling of 42581153 in words is "forty-two million, five hundred eighty-one thousand, one hundred fifty-three".