2381481 has 10 divisors (see below), whose sum is σ = 3557642. Its totient is φ = 1587600.

The previous prime is 2381473. The next prime is 2381497. The reversal of 2381481 is 1841832.

It can be written as a sum of positive squares in only one way, i.e., 1587600 + 793881 = 1260^2 + 891^2 .

It is not a de Polignac number, because 2381481 - 2³ = 2381473 is a prime.

It is a super-2 number, since 2×2381481² = 11342903506722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2381081) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 14620 + ... + 14781.

2^2381481 is an apocalyptic number.

It is an amenable number.

2381481 is a deficient number, since it is larger than the sum of its proper divisors (1176161).

2381481 is an equidigital number, since it uses as much as digits as its factorization.

2381481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29413 (or 29404 counting only the distinct ones).

The product of its digits is 1536, while the sum is 27.

The square root of 2381481 is about 1543.2047822632. The cubic root of 2381481 is about 133.5413329912.

The spelling of 2381481 in words is "two million, three hundred eighty-one thousand, four hundred eighty-one".