42030857 has 4 divisors (see below), whose sum is σ = 45851856. Its totient is φ = 38209860.

The previous prime is 42030827. The next prime is 42030881. The reversal of 42030857 is 75803024.

It is a happy number.

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 42030857 - 2⁸ = 42030601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42030827) 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, 1910483 + ... + 1910504.

It is an arithmetic number, because the mean of its divisors is an integer number (11462964).

Almost surely, 2^42030857 is an apocalyptic number.

It is an amenable number.

42030857 is a deficient number, since it is larger than the sum of its proper divisors (3820999).

42030857 is a wasteful number, since it uses less digits than its factorization.

42030857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3820998.

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 42030857 is about 6483.1209305395. The cubic root of 42030857 is about 347.6877704389.

The spelling of 42030857 in words is "forty-two million, thirty thousand, eight hundred fifty-seven".