2381945 has 8 divisors (see below), whose sum is σ = 2867400. Its totient is φ = 1899520.

The previous prime is 2381941. The next prime is 2381957. The reversal of 2381945 is 5491832.

It can be written as a sum of positive squares in 4 ways, for example, as 466489 + 1915456 = 683^2 + 1384^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2381945 - 2² = 2381941 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2381941) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1715 + ... + 2775.

It is an arithmetic number, because the mean of its divisors is an integer number (358425).

2^2381945 is an apocalyptic number.

It is an amenable number.

2381945 is a deficient number, since it is larger than the sum of its proper divisors (485455).

2381945 is a wasteful number, since it uses less digits than its factorization.

2381945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1515.

The product of its digits is 8640, while the sum is 32.

The square root of 2381945 is about 1543.3551114374. The cubic root of 2381945 is about 133.5500053475.

The spelling of 2381945 in words is "two million, three hundred eighty-one thousand, nine hundred forty-five".