4242731 has 4 divisors (see below), whose sum is σ = 4251864. Its totient is φ = 4233600.

The previous prime is 4242713. The next prime is 4242751. The reversal of 4242731 is 1372424.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4242731 is a prime.

It is a super-2 number, since 2×4242731² = 36001532676722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4242697 and 4242706.

It is not an unprimeable number, because it can be changed into a prime (4242751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3830 + ... + 4811.

It is an arithmetic number, because the mean of its divisors is an integer number (1062966).

Almost surely, 2^4242731 is an apocalyptic number.

4242731 is a deficient number, since it is larger than the sum of its proper divisors (9133).

4242731 is an equidigital number, since it uses as much as digits as its factorization.

4242731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9132.

The product of its digits is 1344, while the sum is 23.

The square root of 4242731 is about 2059.7890668707. The cubic root of 4242731 is about 161.8881893717. Note that the first 3 decimals are identical.

The spelling of 4242731 in words is "four million, two hundred forty-two thousand, seven hundred thirty-one".