42099970 has 16 divisors (see below), whose sum is σ = 82669248. Its totient is φ = 15309040.

The previous prime is 42099961. The next prime is 42099971. The reversal of 42099970 is 7999024.

It is not an unprimeable number, because it can be changed into a prime (42099971) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 191254 + ... + 191473.

It is an arithmetic number, because the mean of its divisors is an integer number (5166828).

Almost surely, 2^42099970 is an apocalyptic number.

42099970 is a deficient number, since it is larger than the sum of its proper divisors (40569278).

42099970 is a wasteful number, since it uses less digits than its factorization.

42099970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 382745.

The product of its (nonzero) digits is 40824, while the sum is 40.

The square root of 42099970 is about 6488.4489672032. The cubic root of 42099970 is about 347.8782383284.

The spelling of 42099970 in words is "forty-two million, ninety-nine thousand, nine hundred seventy".