2141381 has 4 divisors (see below), whose sum is σ = 2336064. Its totient is φ = 1946700.

The previous prime is 2141333. The next prime is 2141401. The reversal of 2141381 is 1831412.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2141381 is a prime.

It is a super-2 number, since 2×2141381² = 9171025174322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2141311) 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, 97325 + ... + 97346.

It is an arithmetic number, because the mean of its divisors is an integer number (584016).

2^2141381 is an apocalyptic number.

It is an amenable number.

2141381 is a deficient number, since it is larger than the sum of its proper divisors (194683).

2141381 is a wasteful number, since it uses less digits than its factorization.

2141381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194682.

The product of its digits is 192, while the sum is 20.

The square root of 2141381 is about 1463.3458237888. The cubic root of 2141381 is about 128.8935885072.

Adding to 2141381 its reverse (1831412), we get a palindrome (3972793).

It can be divided in two parts, 21413 and 81, that multiplied together give a triangular number (1734453 = T₁₈₆₂).

The spelling of 2141381 in words is "two million, one hundred forty-one thousand, three hundred eighty-one".