2385981 has 12 divisors (see below), whose sum is σ = 3711708. Its totient is φ = 1468224.

The previous prime is 2385979. The next prime is 2385983. The reversal of 2385981 is 1895832.

It is an interprime number because it is at equal distance from previous prime (2385979) and next prime (2385983).

It can be written as a sum of positive squares in 2 ways, for example, as 783225 + 1602756 = 885^2 + 1266^2 .

It is not a de Polignac number, because 2385981 - 2¹ = 2385979 is a prime.

It is a super-2 number, since 2×2385981² = 11385810664722, which contains 22 as substring.

2385981 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2385983) 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, 10080 + ... + 10313.

It is an arithmetic number, because the mean of its divisors is an integer number (309309).

2^2385981 is an apocalyptic number.

It is an amenable number.

2385981 is a deficient number, since it is larger than the sum of its proper divisors (1325727).

2385981 is a wasteful number, since it uses less digits than its factorization.

2385981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20412 (or 20409 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

The square root of 2385981 is about 1544.6620989718. The cubic root of 2385981 is about 133.6253924329.

The spelling of 2385981 in words is "two million, three hundred eighty-five thousand, nine hundred eighty-one".