42140999 has 4 divisors (see below), whose sum is σ = 43037664. Its totient is φ = 41244336.

The previous prime is 42140957. The next prime is 42141017. The reversal of 42140999 is 99904124.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42140999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42140939) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 448262 + ... + 448355.

It is an arithmetic number, because the mean of its divisors is an integer number (10759416).

Almost surely, 2^42140999 is an apocalyptic number.

42140999 is a deficient number, since it is larger than the sum of its proper divisors (896665).

42140999 is an equidigital number, since it uses as much as digits as its factorization.

42140999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 896664.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 42140999 is about 6491.6098927770. The cubic root of 42140999 is about 347.9912111886.

The spelling of 42140999 in words is "forty-two million, one hundred forty thousand, nine hundred ninety-nine".