42404291 has 4 divisors (see below), whose sum is σ = 43438584. Its totient is φ = 41370000.

The previous prime is 42404269. The next prime is 42404359. The reversal of 42404291 is 19240424.

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 42404291 - 2⁶ = 42404227 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42404291.

It is not an unprimeable number, because it can be changed into a prime (42404231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 517085 + ... + 517166.

It is an arithmetic number, because the mean of its divisors is an integer number (10859646).

Almost surely, 2^42404291 is an apocalyptic number.

42404291 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

42404291 is a deficient number, since it is larger than the sum of its proper divisors (1034293).

42404291 is a wasteful number, since it uses less digits than its factorization.

42404291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1034292.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 42404291 is about 6511.8577226472. The cubic root of 42404291 is about 348.7144430889.

The spelling of 42404291 in words is "forty-two million, four hundred four thousand, two hundred ninety-one".