2049381 has 10 divisors (see below), whose sum is σ = 3061542. Its totient is φ = 1366200.

The previous prime is 2049361. The next prime is 2049407. The reversal of 2049381 is 1839402.

It can be written as a sum of positive squares in only one way, i.e., 1846881 + 202500 = 1359^2 + 450^2 .

It is not a de Polignac number, because 2049381 - 2⁵ = 2049349 is a prime.

It is a super-2 number, since 2×2049381² = 8399924966322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

2049381 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2049301) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 12570 + ... + 12731.

2^2049381 is an apocalyptic number.

It is an amenable number.

2049381 is a deficient number, since it is larger than the sum of its proper divisors (1012161).

2049381 is an equidigital number, since it uses as much as digits as its factorization.

2049381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25313 (or 25304 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 2049381 is about 1431.5659258309. The cubic root of 2049381 is about 127.0206220258.

The spelling of 2049381 in words is "two million, forty-nine thousand, three hundred eighty-one".