1142555 has 4 divisors (see below), whose sum is σ = 1371072. Its totient is φ = 914040.

The previous prime is 1142549. The next prime is 1142569. The reversal of 1142555 is 5552411.

It is a happy number.

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

It is not a de Polignac number, because 1142555 - 2⁴ = 1142539 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1142555.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114251 + ... + 114260.

It is an arithmetic number, because the mean of its divisors is an integer number (342768).

2^1142555 is an apocalyptic number.

1142555 is a deficient number, since it is larger than the sum of its proper divisors (228517).

1142555 is an equidigital number, since it uses as much as digits as its factorization.

1142555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228516.

The product of its digits is 1000, while the sum is 23.

The square root of 1142555 is about 1068.9036439268. The cubic root of 1142555 is about 104.5423772939.

Adding to 1142555 its reverse (5552411), we get a palindrome (6694966).

The spelling of 1142555 in words is "one million, one hundred forty-two thousand, five hundred fifty-five".