4142381 has 4 divisors (see below), whose sum is σ = 4160700. Its totient is φ = 4124064.

The previous prime is 4142371. The next prime is 4142387. The reversal of 4142381 is 1832414.

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 3822025 + 320356 = 1955^2 + 566^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4142381 is a prime.

It is a super-2 number, since 2×4142381² = 34318640698322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4142387) 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, 8816 + ... + 9273.

It is an arithmetic number, because the mean of its divisors is an integer number (1040175).

Almost surely, 2^4142381 is an apocalyptic number.

It is an amenable number.

4142381 is a deficient number, since it is larger than the sum of its proper divisors (18319).

4142381 is a wasteful number, since it uses less digits than its factorization.

4142381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18318.

The product of its digits is 768, while the sum is 23.

The square root of 4142381 is about 2035.2840096655. The cubic root of 4142381 is about 160.6016540128.

Adding to 4142381 its reverse (1832414), we get a palindrome (5974795).

The spelling of 4142381 in words is "four million, one hundred forty-two thousand, three hundred eighty-one".