42799147 has 4 divisors (see below), whose sum is σ = 43794520. Its totient is φ = 41803776.

The previous prime is 42799123. The next prime is 42799151. The reversal of 42799147 is 74199724.

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

It is a cyclic number.

It is not a de Polignac number, because 42799147 - 2¹⁵ = 42766379 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43), and also a Moran number because the ratio is a prime number: 995329 = 42799147 / (4 + 2 + 7 + 9 + 9 + 1 + 4 + 7).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42799117) 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, 497622 + ... + 497707.

It is an arithmetic number, because the mean of its divisors is an integer number (10948630).

Almost surely, 2^42799147 is an apocalyptic number.

42799147 is a deficient number, since it is larger than the sum of its proper divisors (995373).

42799147 is an equidigital number, since it uses as much as digits as its factorization.

42799147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 995372.

The product of its digits is 127008, while the sum is 43.

The square root of 42799147 is about 6542.1057007664. The cubic root of 42799147 is about 349.7934754389.

The spelling of 42799147 in words is "forty-two million, seven hundred ninety-nine thousand, one hundred forty-seven".