1142545 has 4 divisors (see below), whose sum is σ = 1371060. Its totient is φ = 914032.

The previous prime is 1142539. The next prime is 1142549. The reversal of 1142545 is 5452411.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 904401 + 238144 = 951^2 + 488^2 .

It is a cyclic number.

It is not a de Polignac number, because 1142545 - 2¹⁹ = 618257 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1142549) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114250 + ... + 114259.

It is an arithmetic number, because the mean of its divisors is an integer number (342765).

2^1142545 is an apocalyptic number.

It is an amenable number.

1142545 is a deficient number, since it is larger than the sum of its proper divisors (228515).

1142545 is an equidigital number, since it uses as much as digits as its factorization.

1142545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228514.

The product of its digits is 800, while the sum is 22.

The square root of 1142545 is about 1068.8989662265. The cubic root of 1142545 is about 104.5420722971.

Adding to 1142545 its reverse (5452411), we get a palindrome (6594956).

The spelling of 1142545 in words is "one million, one hundred forty-two thousand, five hundred forty-five".