42994771 has 4 divisors (see below), whose sum is σ = 43636552. Its totient is φ = 42352992.

The previous prime is 42994769. The next prime is 42994789. The reversal of 42994771 is 17749924.

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 42994771 - 2¹ = 42994769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42994741) 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, 320790 + ... + 320923.

It is an arithmetic number, because the mean of its divisors is an integer number (10909138).

Almost surely, 2^42994771 is an apocalyptic number.

42994771 is a deficient number, since it is larger than the sum of its proper divisors (641781).

42994771 is an equidigital number, since it uses as much as digits as its factorization.

42994771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 641780.

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

The square root of 42994771 is about 6557.0398046680. The cubic root of 42994771 is about 350.3256044797.

The spelling of 42994771 in words is "forty-two million, nine hundred ninety-four thousand, seven hundred seventy-one".