1142559 has 16 divisors (see below), whose sum is σ = 1847040. Its totient is φ = 692280.

The previous prime is 1142549. The next prime is 1142569. The reversal of 1142559 is 9552411.

It is an interprime number because it is at equal distance from previous prime (1142549) and next prime (1142569).

It is not a de Polignac number, because 1142559 - 2⁷ = 1142431 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1142509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1627 + ... + 2220.

It is an arithmetic number, because the mean of its divisors is an integer number (115440).

2^1142559 is an apocalyptic number.

1142559 is a deficient number, since it is larger than the sum of its proper divisors (704481).

1142559 is a wasteful number, since it uses less digits than its factorization.

1142559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3867 (or 3861 counting only the distinct ones).

The product of its digits is 1800, while the sum is 27.

The square root of 1142559 is about 1068.9055150012. The cubic root of 1142559 is about 104.5424992921.

The spelling of 1142559 in words is "one million, one hundred forty-two thousand, five hundred fifty-nine".