2406381 has 4 divisors (see below), whose sum is σ = 3208512. Its totient is φ = 1604252.

The previous prime is 2406379. The next prime is 2406457. The reversal of 2406381 is 1836042.

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 2406381 - 2¹ = 2406379 is a prime.

It is a super-2 number, since 2×2406381² = 11581339034322, which contains 22 as substring.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2401381) 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, 401061 + ... + 401066.

It is an arithmetic number, because the mean of its divisors is an integer number (802128).

2^2406381 is an apocalyptic number.

It is an amenable number.

2406381 is a deficient number, since it is larger than the sum of its proper divisors (802131).

2406381 is an equidigital number, since it uses as much as digits as its factorization.

2406381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 802130.

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 2406381 is about 1551.2514302975. The cubic root of 2406381 is about 134.0051420021.

The spelling of 2406381 in words is "two million, four hundred six thousand, three hundred eighty-one".