1543489 has 2 divisors, whose sum is σ = 1543490. Its totient is φ = 1543488.

The previous prime is 1543463. The next prime is 1543501. The reversal of 1543489 is 9843451.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 935089 + 608400 = 967^2 + 780^2 .

It is an emirp because it is prime and its reverse (9843451) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1543489 is a prime.

1543489 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (1543429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 771744 + 771745.

It is an arithmetic number, because the mean of its divisors is an integer number (771745).

2^1543489 is an apocalyptic number.

It is an amenable number.

1543489 is a deficient number, since it is larger than the sum of its proper divisors (1).

1543489 is an equidigital number, since it uses as much as digits as its factorization.

1543489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17280, while the sum is 34.

The square root of 1543489 is about 1242.3723274446. The cubic root of 1543489 is about 115.5671791740.

The spelling of 1543489 in words is "one million, five hundred forty-three thousand, four hundred eighty-nine".