42525881 has 2 divisors, whose sum is σ = 42525882. Its totient is φ = 42525880.

The previous prime is 42525853. The next prime is 42525911. The reversal of 42525881 is 18852524.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42445225 + 80656 = 6515^2 + 284^2 .

It is a cyclic number.

It is not a de Polignac number, because 42525881 - 2⁶ = 42525817 is a prime.

It is a super-2 number, since 2×42525881² = 3616901109652322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42525841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21262940 + 21262941.

It is an arithmetic number, because the mean of its divisors is an integer number (21262941).

Almost surely, 2^42525881 is an apocalyptic number.

It is an amenable number.

42525881 is a deficient number, since it is larger than the sum of its proper divisors (1).

42525881 is an equidigital number, since it uses as much as digits as its factorization.

42525881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25600, while the sum is 35.

The square root of 42525881 is about 6521.1870851863. The cubic root of 42525881 is about 349.0474261157.

The spelling of 42525881 in words is "forty-two million, five hundred twenty-five thousand, eight hundred eighty-one".