7142161 has 8 divisors (see below), whose sum is σ = 7779240. Its totient is φ = 6517632.

The previous prime is 7142141. The next prime is 7142173. The reversal of 7142161 is 1612417.

It can be written as a sum of positive squares in 4 ways, for example, as 690561 + 6451600 = 831^2 + 2540^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7142161 - 2⁵ = 7142129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7142111) 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 7 ways as a sum of consecutive naturals, for example, 1930 + ... + 4243.

It is an arithmetic number, because the mean of its divisors is an integer number (972405).

Almost surely, 2^7142161 is an apocalyptic number.

It is an amenable number.

7142161 is a deficient number, since it is larger than the sum of its proper divisors (637079).

7142161 is a wasteful number, since it uses less digits than its factorization.

7142161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6275.

The product of its digits is 336, while the sum is 22.

The square root of 7142161 is about 2672.4821795477. The cubic root of 7142161 is about 192.5794218854.

Adding to 7142161 its reverse (1612417), we get a palindrome (8754578).

The spelling of 7142161 in words is "seven million, one hundred forty-two thousand, one hundred sixty-one".