42938291 has 4 divisors (see below), whose sum is σ = 46841784. Its totient is φ = 39034800.

The previous prime is 42938281. The next prime is 42938297. The reversal of 42938291 is 19283924.

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

It is a cyclic number.

It is not a de Polignac number, because 42938291 - 2⁶ = 42938227 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42938297) 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, 1951730 + ... + 1951751.

It is an arithmetic number, because the mean of its divisors is an integer number (11710446).

Almost surely, 2^42938291 is an apocalyptic number.

42938291 is a deficient number, since it is larger than the sum of its proper divisors (3903493).

42938291 is a wasteful number, since it uses less digits than its factorization.

42938291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3903492.

The product of its digits is 31104, while the sum is 38.

The square root of 42938291 is about 6552.7315678273. The cubic root of 42938291 is about 350.1721357351.

The spelling of 42938291 in words is "forty-two million, nine hundred thirty-eight thousand, two hundred ninety-one".