1142605 has 4 divisors (see below), whose sum is σ = 1371132. Its totient is φ = 914080.

The previous prime is 1142599. The next prime is 1142633. The reversal of 1142605 is 5062411.

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 660969 + 481636 = 813^2 + 694^2 .

It is not a de Polignac number, because 1142605 - 2⁵ = 1142573 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 114256 + ... + 114265.

It is an arithmetic number, because the mean of its divisors is an integer number (342783).

2^1142605 is an apocalyptic number.

It is an amenable number.

1142605 is a deficient number, since it is larger than the sum of its proper divisors (228527).

1142605 is an equidigital number, since it uses as much as digits as its factorization.

1142605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228526.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 1142605 is about 1068.9270321215. The cubic root of 1142605 is about 104.5439022511.

The spelling of 1142605 in words is "one million, one hundred forty-two thousand, six hundred five".