42505768 has 8 divisors (see below), whose sum is σ = 79698330. Its totient is φ = 21252880.

The previous prime is 42505759. The next prime is 42505781. The reversal of 42505768 is 86750524.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 21511044 + 20994724 = 4638^2 + 4582^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2656603 + ... + 2656618.

Almost surely, 2^42505768 is an apocalyptic number.

It is an amenable number.

42505768 is a deficient number, since it is larger than the sum of its proper divisors (37192562).

42505768 is a wasteful number, since it uses less digits than its factorization.

42505768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5313227 (or 5313223 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 37.

The square root of 42505768 is about 6519.6447755994. The cubic root of 42505768 is about 348.9923890591.

The spelling of 42505768 in words is "forty-two million, five hundred five thousand, seven hundred sixty-eight".