42099242 has 16 divisors (see below), whose sum is σ = 69170760. Its totient is φ = 19127808.

The previous prime is 42099227. The next prime is 42099287. The reversal of 42099242 is 24299024.

It can be written as a sum of positive squares in 4 ways, for example, as 34586161 + 7513081 = 5881^2 + 2741^2 .

It is a junction number, because it is equal to n+sod(n) for n = 42099199 and 42099208.

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, 20363 + ... + 22334.

Almost surely, 2^42099242 is an apocalyptic number.

42099242 is a deficient number, since it is larger than the sum of its proper divisors (27071518).

42099242 is a wasteful number, since it uses less digits than its factorization.

42099242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42745.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 42099242 is about 6488.3928672669. The cubic root of 42099242 is about 347.8762331265.

The spelling of 42099242 in words is "forty-two million, ninety-nine thousand, two hundred forty-two".