42404149 has 4 divisors (see below), whose sum is σ = 43390336. Its totient is φ = 41417964.

The previous prime is 42404147. The next prime is 42404189. The reversal of 42404149 is 94140424.

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 not a de Polignac number, because 42404149 - 2¹ = 42404147 is a prime.

It is a super-2 number, since 2×42404149² = 3596223704828402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42404147) 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, 493029 + ... + 493114.

It is an arithmetic number, because the mean of its divisors is an integer number (10847584).

Almost surely, 2^42404149 is an apocalyptic number.

It is an amenable number.

42404149 is a deficient number, since it is larger than the sum of its proper divisors (986187).

42404149 is an equidigital number, since it uses as much as digits as its factorization.

42404149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 986186.

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 42404149 is about 6511.8468194515. The cubic root of 42404149 is about 348.7140538398.

The spelling of 42404149 in words is "forty-two million, four hundred four thousand, one hundred forty-nine".