42288069 has 4 divisors (see below), whose sum is σ = 56384096. Its totient is φ = 28192044.

The previous prime is 42288047. The next prime is 42288089. The reversal of 42288069 is 96088224.

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 not a de Polignac number, because 42288069 - 2⁷ = 42287941 is a prime.

It is a super-2 number, since 2×42288069² = 3576561559497522, 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 (42288019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7048009 + ... + 7048014.

It is an arithmetic number, because the mean of its divisors is an integer number (14096024).

Almost surely, 2^42288069 is an apocalyptic number.

It is an amenable number.

42288069 is a deficient number, since it is larger than the sum of its proper divisors (14096027).

42288069 is a wasteful number, since it uses less digits than its factorization.

42288069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14096026.

The product of its (nonzero) digits is 55296, while the sum is 39.

The square root of 42288069 is about 6502.9277252634. The cubic root of 42288069 is about 348.3955651933.

The spelling of 42288069 in words is "forty-two million, two hundred eighty-eight thousand, sixty-nine".