42851577 has 16 divisors (see below), whose sum is σ = 60730560. Its totient is φ = 26783232.

The previous prime is 42851563. The next prime is 42851603. The reversal of 42851577 is 77515824.

It is not a de Polignac number, because 42851577 - 2⁸ = 42851321 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42851527) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12949 + ... + 15917.

It is an arithmetic number, because the mean of its divisors is an integer number (3795660).

Almost surely, 2^42851577 is an apocalyptic number.

It is an amenable number.

42851577 is a deficient number, since it is larger than the sum of its proper divisors (17878983).

42851577 is a wasteful number, since it uses less digits than its factorization.

42851577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3272.

The product of its digits is 78400, while the sum is 39.

The square root of 42851577 is about 6546.1115939159. Note that the first 3 decimals coincide. The cubic root of 42851577 is about 349.9362523355.

The spelling of 42851577 in words is "forty-two million, eight hundred fifty-one thousand, five hundred seventy-seven".