7142081 has 4 divisors (see below), whose sum is σ = 7518000. Its totient is φ = 6766164.

The previous prime is 7142053. The next prime is 7142111. The reversal of 7142081 is 1802417.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1802417 = 757 ⋅2381.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7142081 is a prime.

It is a super-2 number, since 2×7142081² = 102018642021122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7142011) 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, 187931 + ... + 187968.

It is an arithmetic number, because the mean of its divisors is an integer number (1879500).

Almost surely, 2^7142081 is an apocalyptic number.

It is an amenable number.

7142081 is a deficient number, since it is larger than the sum of its proper divisors (375919).

7142081 is a wasteful number, since it uses less digits than its factorization.

7142081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375918.

The product of its (nonzero) digits is 448, while the sum is 23.

The square root of 7142081 is about 2672.4672121469. The cubic root of 7142081 is about 192.5787028495.

Adding to 7142081 its reverse (1802417), we get a palindrome (8944498).

The spelling of 7142081 in words is "seven million, one hundred forty-two thousand, eighty-one".