2067381 has 18 divisors (see below), whose sum is σ = 3124290. Its totient is φ = 1315776.

The previous prime is 2067379. The next prime is 2067383. The reversal of 2067381 is 1837602.

It is an interprime number because it is at equal distance from previous prime (2067379) and next prime (2067383).

It can be written as a sum of positive squares in 3 ways, for example, as 11025 + 2056356 = 105^2 + 1434^2 .

It is not a de Polignac number, because 2067381 - 2¹ = 2067379 is a prime.

It is a super-2 number, since 2×2067381² = 8548128398322, which contains 22 as substring.

It is an Ulam number.

2067381 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2067383) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 23185 + ... + 23273.

2^2067381 is an apocalyptic number.

It is an amenable number.

2067381 is a deficient number, since it is larger than the sum of its proper divisors (1056909).

2067381 is an equidigital number, since it uses as much as digits as its factorization.

2067381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213 (or 121 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 2067381 is about 1437.8390035049. The cubic root of 2067381 is about 127.3914185135.

The spelling of 2067381 in words is "two million, sixty-seven thousand, three hundred eighty-one".