42905293 has 4 divisors (see below), whose sum is σ = 42933600. Its totient is φ = 42876988.

The previous prime is 42905279. The next prime is 42905321. The reversal of 42905293 is 39250924.

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 a de Polignac number, because none of the positive numbers 2^k-42905293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42905243) 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, 11743 + ... + 14956.

It is an arithmetic number, because the mean of its divisors is an integer number (10733400).

Almost surely, 2^42905293 is an apocalyptic number.

It is an amenable number.

42905293 is a deficient number, since it is larger than the sum of its proper divisors (28307).

42905293 is a wasteful number, since it uses less digits than its factorization.

42905293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28306.

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 42905293 is about 6550.2132026370. The cubic root of 42905293 is about 350.0824105262.

The spelling of 42905293 in words is "forty-two million, nine hundred five thousand, two hundred ninety-three".