42947605 has 4 divisors (see below), whose sum is σ = 51537132. Its totient is φ = 34358080.

The previous prime is 42947539. The next prime is 42947609. The reversal of 42947605 is 50674924.

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

It can be written as a sum of positive squares in 2 ways, for example, as 30052324 + 12895281 = 5482^2 + 3591^2 .

It is a de Polignac number, because none of the positive numbers 2^k-42947605 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 (42947609) 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, 4294756 + ... + 4294765.

It is an arithmetic number, because the mean of its divisors is an integer number (12884283).

Almost surely, 2^42947605 is an apocalyptic number.

It is an amenable number.

42947605 is a deficient number, since it is larger than the sum of its proper divisors (8589527).

42947605 is an equidigital number, since it uses as much as digits as its factorization.

42947605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8589526.

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 42947605 is about 6553.4422252737. The cubic root of 42947605 is about 350.1974532113.

The spelling of 42947605 in words is "forty-two million, nine hundred forty-seven thousand, six hundred five".