7142181 has 4 divisors (see below), whose sum is σ = 9522912. Its totient is φ = 4761452.

The previous prime is 7142173. The next prime is 7142189. The reversal of 7142181 is 1812417.

7142181 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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.

It is an interprime number because it is at equal distance from previous prime (7142173) and next prime (7142189).

It is a cyclic number.

It is not a de Polignac number, because 7142181 - 2³ = 7142173 is a prime.

It is a super-2 number, since 2×7142181² = 102021498873522, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7142189) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1190361 + ... + 1190366.

It is an arithmetic number, because the mean of its divisors is an integer number (2380728).

Almost surely, 2^7142181 is an apocalyptic number.

It is an amenable number.

7142181 is a deficient number, since it is larger than the sum of its proper divisors (2380731).

7142181 is a wasteful number, since it uses less digits than its factorization.

7142181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2380730.

The product of its digits is 448, while the sum is 24.

The square root of 7142181 is about 2672.4859213848. The cubic root of 7142181 is about 192.5796016436.

Adding to 7142181 its reverse (1812417), we get a palindrome (8954598).

It can be divided in two parts, 71421 and 81, that multiplied together give a triangular number (5785101 = T₃₄₀₁).

The spelling of 7142181 in words is "seven million, one hundred forty-two thousand, one hundred eighty-one".