42529561 has 4 divisors (see below), whose sum is σ = 42666624. Its totient is φ = 42392500.

The previous prime is 42529559. The next prime is 42529579. The reversal of 42529561 is 16592524.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42529561 - 2¹ = 42529559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42529541) 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, 68065 + ... + 68686.

It is an arithmetic number, because the mean of its divisors is an integer number (10666656).

Almost surely, 2^42529561 is an apocalyptic number.

It is an amenable number.

42529561 is a deficient number, since it is larger than the sum of its proper divisors (137063).

42529561 is a wasteful number, since it uses less digits than its factorization.

42529561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137062.

The product of its digits is 21600, while the sum is 34.

The square root of 42529561 is about 6521.4692362994. The cubic root of 42529561 is about 349.0574941609.

The spelling of 42529561 in words is "forty-two million, five hundred twenty-nine thousand, five hundred sixty-one".