42428497 has 4 divisors (see below), whose sum is σ = 42448896. Its totient is φ = 42408100.

The previous prime is 42428483. The next prime is 42428509. The reversal of 42428497 is 79482424.

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 42428497 - 2⁷ = 42428369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42428417) 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, 6673 + ... + 11374.

It is an arithmetic number, because the mean of its divisors is an integer number (10612224).

Almost surely, 2^42428497 is an apocalyptic number.

It is an amenable number.

42428497 is a deficient number, since it is larger than the sum of its proper divisors (20399).

42428497 is a wasteful number, since it uses less digits than its factorization.

42428497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20398.

The product of its digits is 129024, while the sum is 40.

The square root of 42428497 is about 6513.7160668853. The cubic root of 42428497 is about 348.7807836720.

The spelling of 42428497 in words is "forty-two million, four hundred twenty-eight thousand, four hundred ninety-seven".