2001481 has 2 divisors, whose sum is σ = 2001482. Its totient is φ = 2001480.

The previous prime is 2001469. The next prime is 2001487. The reversal of 2001481 is 1841002.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1742400 + 259081 = 1320^2 + 509^2 .

It is a cyclic number.

It is not a de Polignac number, because 2001481 - 2⁵ = 2001449 is a prime.

It is a super-2 number, since 2×2001481² = 8011852386722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2001487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000740 + 1000741.

It is an arithmetic number, because the mean of its divisors is an integer number (1000741).

2^2001481 is an apocalyptic number.

It is an amenable number.

2001481 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001481 is an equidigital number, since it uses as much as digits as its factorization.

2001481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 2001481 is about 1414.7370780467. The cubic root of 2001481 is about 126.0231963676.

Adding to 2001481 its reverse (1841002), we get a palindrome (3842483).

It can be divided in two parts, 200 and 1481, that added together give a square (1681 = 41²).

The spelling of 2001481 in words is "two million, one thousand, four hundred eighty-one".