42999994 has 16 divisors (see below), whose sum is σ = 66997800. Its totient is φ = 20680704.

The previous prime is 42999977. The next prime is 43000019. The reversal of 42999994 is 49999924.

It can be written as a sum of positive squares in 4 ways, for example, as 30305025 + 12694969 = 5505^2 + 3563^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3322 + ... + 9850.

Almost surely, 2^42999994 is an apocalyptic number.

42999994 is a deficient number, since it is larger than the sum of its proper divisors (23997806).

42999994 is a wasteful number, since it uses less digits than its factorization.

42999994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6657.

The product of its digits is 1889568, while the sum is 55.

The square root of 42999994 is about 6557.4380668063. The cubic root of 42999994 is about 350.3397897438.

The spelling of 42999994 in words is "forty-two million, nine hundred ninety-nine thousand, nine hundred ninety-four".