42104479 has 4 divisors (see below), whose sum is σ = 43462720. Its totient is φ = 40746240.

The previous prime is 42104477. The next prime is 42104509. The reversal of 42104479 is 97440124.

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 42104479 - 2¹ = 42104477 is a prime.

It is a super-2 number, since 2×42104479² = 3545574303722882, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31), and also a Moran number because the ratio is a prime number: 1358209 = 42104479 / (4 + 2 + 1 + 0 + 4 + 4 + 7 + 9).

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 42104479.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42104473) 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, 679074 + ... + 679135.

It is an arithmetic number, because the mean of its divisors is an integer number (10865680).

Almost surely, 2^42104479 is an apocalyptic number.

42104479 is a deficient number, since it is larger than the sum of its proper divisors (1358241).

42104479 is a wasteful number, since it uses less digits than its factorization.

42104479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1358240.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 42104479 is about 6488.7964215253. The cubic root of 42104479 is about 347.8906573949.

The spelling of 42104479 in words is "forty-two million, one hundred four thousand, four hundred seventy-nine".