2403381 has 4 divisors (see below), whose sum is σ = 3204512. Its totient is φ = 1602252.

The previous prime is 2403377. The next prime is 2403383. The reversal of 2403381 is 1833042.

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 not a de Polignac number, because 2403381 - 2² = 2403377 is a prime.

It is a super-2 number, since 2×2403381² = 11552480462322, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2403383) 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, 400561 + ... + 400566.

It is an arithmetic number, because the mean of its divisors is an integer number (801128).

2^2403381 is an apocalyptic number.

It is an amenable number.

2403381 is a deficient number, since it is larger than the sum of its proper divisors (801131).

2403381 is an equidigital number, since it uses as much as digits as its factorization.

2403381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 801130.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 2403381 is about 1550.2841674996. The cubic root of 2403381 is about 133.9494314276.

The spelling of 2403381 in words is "two million, four hundred three thousand, three hundred eighty-one".