1218571 has 2 divisors, whose sum is σ = 1218572. Its totient is φ = 1218570.

The previous prime is 1218559. The next prime is 1218583. The reversal of 1218571 is 1758121.

It is a balanced prime because it is at equal distance from previous prime (1218559) and next prime (1218583).

It is a cyclic number.

It is not a de Polignac number, because 1218571 - 2¹³ = 1210379 is a prime.

It is not a weakly prime, because it can be changed into another prime (1228571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 609285 + 609286.

It is an arithmetic number, because the mean of its divisors is an integer number (609286).

2^1218571 is an apocalyptic number.

1218571 is a deficient number, since it is larger than the sum of its proper divisors (1).

1218571 is an equidigital number, since it uses as much as digits as its factorization.

1218571 is an evil number, because the sum of its binary digits is even.

The product of its digits is 560, while the sum is 25.

The square root of 1218571 is about 1103.8890342784. The cubic root of 1218571 is about 106.8112373443.

The spelling of 1218571 in words is "one million, two hundred eighteen thousand, five hundred seventy-one".