42500057 has 4 divisors (see below), whose sum is σ = 42770916. Its totient is φ = 42229200.

The previous prime is 42500053. The next prime is 42500071. The reversal of 42500057 is 75000524.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 27258841 + 15241216 = 5221^2 + 3904^2 .

It is a cyclic number.

It is not a de Polignac number, because 42500057 - 2² = 42500053 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42500053) 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, 135194 + ... + 135507.

It is an arithmetic number, because the mean of its divisors is an integer number (10692729).

Almost surely, 2^42500057 is an apocalyptic number.

It is an amenable number.

42500057 is a deficient number, since it is larger than the sum of its proper divisors (270859).

42500057 is a wasteful number, since it uses less digits than its factorization.

42500057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270858.

The product of its (nonzero) digits is 1400, while the sum is 23.

The square root of 42500057 is about 6519.2067769016. The cubic root of 42500057 is about 348.9767583584.

The spelling of 42500057 in words is "forty-two million, five hundred thousand, fifty-seven".