42529891 has 4 divisors (see below), whose sum is σ = 42720832. Its totient is φ = 42338952.

The previous prime is 42529843. The next prime is 42529901. The reversal of 42529891 is 19892524.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42529891 - 2⁷ = 42529763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42529831) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95136 + ... + 95581.

It is an arithmetic number, because the mean of its divisors is an integer number (10680208).

Almost surely, 2^42529891 is an apocalyptic number.

42529891 is a deficient number, since it is larger than the sum of its proper divisors (190941).

42529891 is a wasteful number, since it uses less digits than its factorization.

42529891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190940.

The product of its digits is 51840, while the sum is 40.

The square root of 42529891 is about 6521.4945372974. The cubic root of 42529891 is about 349.0583969735.

The spelling of 42529891 in words is "forty-two million, five hundred twenty-nine thousand, eight hundred ninety-one".