42390479 has 4 divisors (see below), whose sum is σ = 42987600. Its totient is φ = 41793360.

The previous prime is 42390451. The next prime is 42390487. The reversal of 42390479 is 97409324.

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 42390479 - 2⁸ = 42390223 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 (42392479) 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, 298454 + ... + 298595.

It is an arithmetic number, because the mean of its divisors is an integer number (10746900).

Almost surely, 2^42390479 is an apocalyptic number.

42390479 is a deficient number, since it is larger than the sum of its proper divisors (597121).

42390479 is an equidigital number, since it uses as much as digits as its factorization.

42390479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 597120.

The product of its (nonzero) digits is 54432, while the sum is 38.

The square root of 42390479 is about 6510.7971094176. The cubic root of 42390479 is about 348.6765776842.

The spelling of 42390479 in words is "forty-two million, three hundred ninety thousand, four hundred seventy-nine".