7031161 has 4 divisors (see below), whose sum is σ = 7078500. Its totient is φ = 6983824.

The previous prime is 7031113. The next prime is 7031173. The reversal of 7031161 is 1611307.

It is a happy number.

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 4410000 + 2621161 = 2100^2 + 1619^2 .

It is a cyclic number.

It is not a de Polignac number, because 7031161 - 2¹³ = 7022969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7031111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23446 + ... + 23743.

It is an arithmetic number, because the mean of its divisors is an integer number (1769625).

Almost surely, 2^7031161 is an apocalyptic number.

It is an amenable number.

7031161 is a deficient number, since it is larger than the sum of its proper divisors (47339).

7031161 is a wasteful number, since it uses less digits than its factorization.

7031161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47338.

The product of its (nonzero) digits is 126, while the sum is 19.

The square root of 7031161 is about 2651.6336473955. The cubic root of 7031161 is about 191.5765497804.

Adding to 7031161 its reverse (1611307), we get a palindrome (8642468).

The spelling of 7031161 in words is "seven million, thirty-one thousand, one hundred sixty-one".