2409381 has 12 divisors (see below), whose sum is σ = 3748108. Its totient is φ = 1482624.

The previous prime is 2409377. The next prime is 2409389. The reversal of 2409381 is 1839042.

It can be written as a sum of positive squares in 2 ways, for example, as 1476225 + 933156 = 1215^2 + 966^2 .

It is not a de Polignac number, because 2409381 - 2² = 2409377 is a prime.

It is a super-2 number, since 2×2409381² = 11610233606322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2409389) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10180 + ... + 10413.

2^2409381 is an apocalyptic number.

It is an amenable number.

2409381 is a deficient number, since it is larger than the sum of its proper divisors (1338727).

2409381 is a wasteful number, since it uses less digits than its factorization.

2409381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20612 (or 20609 counting only the distinct ones).

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

The square root of 2409381 is about 1552.2180903468. The cubic root of 2409381 is about 134.0608062935.

The spelling of 2409381 in words is "two million, four hundred nine thousand, three hundred eighty-one".