42950721 has 16 divisors (see below), whose sum is σ = 66149568. Its totient is φ = 24499200.

The previous prime is 42950701. The next prime is 42950741. The reversal of 42950721 is 12705924.

It is an interprime number because it is at equal distance from previous prime (42950701) and next prime (42950741).

It is not a de Polignac number, because 42950721 - 2⁵ = 42950689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42950701) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37720 + ... + 38841.

It is an arithmetic number, because the mean of its divisors is an integer number (4134348).

Almost surely, 2^42950721 is an apocalyptic number.

It is an amenable number.

42950721 is a deficient number, since it is larger than the sum of its proper divisors (23198847).

42950721 is a wasteful number, since it uses less digits than its factorization.

42950721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76592.

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 42950721 is about 6553.6799586187. The cubic root of 42950721 is about 350.2059223593.

The spelling of 42950721 in words is "forty-two million, nine hundred fifty thousand, seven hundred twenty-one".