7072731 has 32 divisors (see below), whose sum is σ = 11692800. Its totient is φ = 4199040.

The previous prime is 7072699. The next prime is 7072771. The reversal of 7072731 is 1372707.

It is not a de Polignac number, because 7072731 - 2⁵ = 7072699 is a prime.

It is a super-2 number, since 2×7072731² = 100047047596722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 7072695 and 7072704.

It is not an unprimeable number, because it can be changed into a prime (7072771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8316 + ... + 9126.

It is an arithmetic number, because the mean of its divisors is an integer number (365400).

Almost surely, 2^7072731 is an apocalyptic number.

7072731 is a deficient number, since it is larger than the sum of its proper divisors (4620069).

7072731 is a wasteful number, since it uses less digits than its factorization.

7072731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 856 (or 850 counting only the distinct ones).

The product of its (nonzero) digits is 2058, while the sum is 27.

The square root of 7072731 is about 2659.4606596075. The cubic root of 7072731 is about 191.9533578108.

The spelling of 7072731 in words is "seven million, seventy-two thousand, seven hundred thirty-one".