42479409 has 16 divisors (see below), whose sum is σ = 64834560. Its totient is φ = 24234960.

The previous prime is 42479401. The next prime is 42479419. The reversal of 42479409 is 90497424.

It is a happy number.

It is not a de Polignac number, because 42479409 - 2³ = 42479401 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42479401) 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 15 ways as a sum of consecutive naturals, for example, 16414 + ... + 18824.

It is an arithmetic number, because the mean of its divisors is an integer number (4052160).

Almost surely, 2^42479409 is an apocalyptic number.

It is an amenable number.

42479409 is a deficient number, since it is larger than the sum of its proper divisors (22355151).

42479409 is a wasteful number, since it uses less digits than its factorization.

42479409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3260.

The product of its (nonzero) digits is 72576, while the sum is 39.

The square root of 42479409 is about 6517.6229562625. The cubic root of 42479409 is about 348.9202342041.

The spelling of 42479409 in words is "forty-two million, four hundred seventy-nine thousand, four hundred nine".