42307947 has 32 divisors (see below), whose sum is σ = 68866560. Its totient is φ = 25457760.

The previous prime is 42307931. The next prime is 42307949. The reversal of 42307947 is 74970324.

It is not a de Polignac number, because 42307947 - 2⁴ = 42307931 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42307949) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 49173 + ... + 50025.

It is an arithmetic number, because the mean of its divisors is an integer number (2152080).

Almost surely, 2^42307947 is an apocalyptic number.

42307947 is a deficient number, since it is larger than the sum of its proper divisors (26558613).

42307947 is a wasteful number, since it uses less digits than its factorization.

42307947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1040 (or 1034 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 36.

The square root of 42307947 is about 6504.4559342039. The cubic root of 42307947 is about 348.4501457750.

The spelling of 42307947 in words is "forty-two million, three hundred seven thousand, nine hundred forty-seven".