1142569 has 2 divisors, whose sum is σ = 1142570. Its totient is φ = 1142568.

The previous prime is 1142549. The next prime is 1142573. The reversal of 1142569 is 9652411.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 788544 + 354025 = 888^2 + 595^2 .

It is an emirp because it is prime and its reverse (9652411) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1142569 is a prime.

It is a super-2 number, since 2×1142569² = 2610927839522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1142509) 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, 571284 + 571285.

It is an arithmetic number, because the mean of its divisors is an integer number (571285).

2^1142569 is an apocalyptic number.

It is an amenable number.

1142569 is a deficient number, since it is larger than the sum of its proper divisors (1).

1142569 is an equidigital number, since it uses as much as digits as its factorization.

1142569 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2160, while the sum is 28.

The square root of 1142569 is about 1068.9101926729. The cubic root of 1142569 is about 104.5428042864.

It can be divided in two parts, 1142 and 569, that added together give a triangular number (1711 = T₅₈).

The spelling of 1142569 in words is "one million, one hundred forty-two thousand, five hundred sixty-nine".