1142665 has 8 divisors (see below), whose sum is σ = 1380168. Its totient is φ = 908160.

The previous prime is 1142651. The next prime is 1142677. The reversal of 1142665 is 5662411.

It can be written as a sum of positive squares in 4 ways, for example, as 606841 + 535824 = 779^2 + 732^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1142665 - 2⁵ = 1142633 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 205 + ... + 1525.

It is an arithmetic number, because the mean of its divisors is an integer number (172521).

2^1142665 is an apocalyptic number.

It is an amenable number.

1142665 is a deficient number, since it is larger than the sum of its proper divisors (237503).

1142665 is a wasteful number, since it uses less digits than its factorization.

1142665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1499.

The product of its digits is 1440, while the sum is 25.

The square root of 1142665 is about 1068.9550972796. The cubic root of 1142665 is about 104.5457321411.

It can be divided in two parts, 114 and 2665, that multiplied together give a triangular number (303810 = T₇₇₉).

The spelling of 1142665 in words is "one million, one hundred forty-two thousand, six hundred sixty-five".