42544069 has 4 divisors (see below), whose sum is σ = 42564544. Its totient is φ = 42523596.

The previous prime is 42544067. The next prime is 42544079. The reversal of 42544069 is 96044524.

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 42544069 - 2¹ = 42544067 is a prime.

It is a super-2 number, since 2×42544069² = 3619995614153522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42544063) 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, 6717 + ... + 11410.

It is an arithmetic number, because the mean of its divisors is an integer number (10641136).

Almost surely, 2^42544069 is an apocalyptic number.

It is an amenable number.

42544069 is a deficient number, since it is larger than the sum of its proper divisors (20475).

42544069 is a wasteful number, since it uses less digits than its factorization.

42544069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20474.

The product of its (nonzero) digits is 34560, while the sum is 34.

The square root of 42544069 is about 6522.5814674866. The cubic root of 42544069 is about 349.0971806776.

The spelling of 42544069 in words is "forty-two million, five hundred forty-four thousand, sixty-nine".