42099430 has 16 divisors (see below), whose sum is σ = 79074144. Its totient is φ = 16107520.

The previous prime is 42099413. The next prime is 42099433. The reversal of 42099430 is 3499024.

It is a junction number, because it is equal to n+sod(n) for n = 42099392 and 42099401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42099433) 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 7 ways as a sum of consecutive naturals, for example, 91291 + ... + 91750.

It is an arithmetic number, because the mean of its divisors is an integer number (4942134).

Almost surely, 2^42099430 is an apocalyptic number.

42099430 is a deficient number, since it is larger than the sum of its proper divisors (36974714).

42099430 is a wasteful number, since it uses less digits than its factorization.

42099430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183071.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 42099430 is about 6488.4073546595. The cubic root of 42099430 is about 347.8767509556.

The spelling of 42099430 in words is "forty-two million, ninety-nine thousand, four hundred thirty".