1142564 has 6 divisors (see below), whose sum is σ = 1999494. Its totient is φ = 571280.

The previous prime is 1142549. The next prime is 1142569. The reversal of 1142564 is 4652411.

It can be written as a sum of positive squares in only one way, i.e., 792100 + 350464 = 890^2 + 592^2 .

It is not an unprimeable number, because it can be changed into a prime (1142569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142817 + ... + 142824.

It is an arithmetic number, because the mean of its divisors is an integer number (333249).

2^1142564 is an apocalyptic number.

It is an amenable number.

1142564 is a deficient number, since it is larger than the sum of its proper divisors (856930).

1142564 is a wasteful number, since it uses less digits than its factorization.

1142564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285645 (or 285643 counting only the distinct ones).

The product of its digits is 960, while the sum is 23.

The square root of 1142564 is about 1068.9078538396. The cubic root of 1142564 is about 104.5426517894.

Adding to 1142564 its reverse (4652411), we get a palindrome (5794975).

The spelling of 1142564 in words is "one million, one hundred forty-two thousand, five hundred sixty-four".