42029857 has 4 divisors (see below), whose sum is σ = 42090516. Its totient is φ = 41969200.

The previous prime is 42029821. The next prime is 42029863. The reversal of 42029857 is 75892024.

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 24690961 + 17338896 = 4969^2 + 4164^2 .

It is a cyclic number.

It is not a de Polignac number, because 42029857 - 2¹¹ = 42027809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42029807) 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, 29278 + ... + 30679.

It is an arithmetic number, because the mean of its divisors is an integer number (10522629).

Almost surely, 2^42029857 is an apocalyptic number.

It is an amenable number.

42029857 is a deficient number, since it is larger than the sum of its proper divisors (60659).

42029857 is an equidigital number, since it uses as much as digits as its factorization.

42029857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60658.

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 42029857 is about 6483.0438067315. The cubic root of 42029857 is about 347.6850130161.

The spelling of 42029857 in words is "forty-two million, twenty-nine thousand, eight hundred fifty-seven".