2002381 has 4 divisors (see below), whose sum is σ = 2048992. Its totient is φ = 1955772.

The previous prime is 2002373. The next prime is 2002387. The reversal of 2002381 is 1832002.

It is a happy number.

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 not a de Polignac number, because 2002381 - 2³ = 2002373 is a prime.

It is a super-2 number, since 2×2002381² = 8019059338322, 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 (2002387) 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, 23241 + ... + 23326.

It is an arithmetic number, because the mean of its divisors is an integer number (512248).

2^2002381 is an apocalyptic number.

It is an amenable number.

2002381 is a deficient number, since it is larger than the sum of its proper divisors (46611).

2002381 is an equidigital number, since it uses as much as digits as its factorization.

2002381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46610.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 2002381 is about 1415.0551226012. The cubic root of 2002381 is about 126.0420830288.

Adding to 2002381 its reverse (1832002), we get a palindrome (3834383).

The spelling of 2002381 in words is "two million, two thousand, three hundred eighty-one".