42497777 has 8 divisors (see below), whose sum is σ = 48759936. Its totient is φ = 36283392.

The previous prime is 42497761. The next prime is 42497783. The reversal of 42497777 is 77779424.

It is a happy number.

42497777 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42497777 - 2⁴ = 42497761 is a prime.

It is a super-2 number, since 2×42497777² = 3612122099883458, which contains 22 as substring.

It is a Duffinian number.

42497777 is a modest number, since divided by 7777 gives 4249 as remainder.

It is not an unprimeable number, because it can be changed into a prime (42497797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10013 + ... + 13610.

It is an arithmetic number, because the mean of its divisors is an integer number (6094992).

Almost surely, 2^42497777 is an apocalyptic number.

It is an amenable number.

42497777 is a deficient number, since it is larger than the sum of its proper divisors (6262159).

42497777 is a wasteful number, since it uses less digits than its factorization.

42497777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23887.

The product of its digits is 691488, while the sum is 47.

The square root of 42497777 is about 6519.0319066561. The cubic root of 42497777 is about 348.9705177297.

The spelling of 42497777 in words is "forty-two million, four hundred ninety-seven thousand, seven hundred seventy-seven".