1540027 has 2 divisors, whose sum is σ = 1540028. Its totient is φ = 1540026.

The previous prime is 1540009. The next prime is 1540031. The reversal of 1540027 is 7200451.

It is a strong prime.

It is an emirp because it is prime and its reverse (7200451) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1540027 - 2¹⁹ = 1015739 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1539986 and 1540013.

It is not a weakly prime, because it can be changed into another prime (1540087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 770013 + 770014.

It is an arithmetic number, because the mean of its divisors is an integer number (770014).

2^1540027 is an apocalyptic number.

1540027 is a deficient number, since it is larger than the sum of its proper divisors (1).

1540027 is an equidigital number, since it uses as much as digits as its factorization.

1540027 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 280, while the sum is 19.

The square root of 1540027 is about 1240.9782431614. The cubic root of 1540027 is about 115.4807099085.

Adding to 1540027 its reverse (7200451), we get a palindrome (8740478).

The spelling of 1540027 in words is "one million, five hundred forty thousand, twenty-seven".