1518481 has 2 divisors, whose sum is σ = 1518482. Its totient is φ = 1518480.

The previous prime is 1518467. The next prime is 1518497. The reversal of 1518481 is 1848151.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1050625 + 467856 = 1025^2 + 684^2 .

It is an emirp because it is prime and its reverse (1848151) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1518481 - 2⁵ = 1518449 is a prime.

It is a super-2 number, since 2×1518481² = 4611569094722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1518281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 759240 + 759241.

It is an arithmetic number, because the mean of its divisors is an integer number (759241).

2^1518481 is an apocalyptic number.

It is an amenable number.

1518481 is a deficient number, since it is larger than the sum of its proper divisors (1).

1518481 is an equidigital number, since it uses as much as digits as its factorization.

1518481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1280, while the sum is 28.

The square root of 1518481 is about 1232.2666107625. The cubic root of 1518481 is about 114.9396280472.

It can be divided in two parts, 15 and 18481, that added together give a square (18496 = 136²).

The spelling of 1518481 in words is "one million, five hundred eighteen thousand, four hundred eighty-one".