1165642 has 4 divisors (see below), whose sum is σ = 1748466. Its totient is φ = 582820.

The previous prime is 1165583. The next prime is 1165643. The reversal of 1165642 is 2465611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2465611 = 19 ⋅129769.

It can be written as a sum of positive squares in only one way, i.e., 1042441 + 123201 = 1021^2 + 351^2 .

It is not an unprimeable number, because it can be changed into a prime (1165643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 291409 + ... + 291412.

2^1165642 is an apocalyptic number.

1165642 is a deficient number, since it is larger than the sum of its proper divisors (582824).

1165642 is an equidigital number, since it uses as much as digits as its factorization.

1165642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 582823.

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

The square root of 1165642 is about 1079.6490170421. The cubic root of 1165642 is about 105.2418311092.

The spelling of 1165642 in words is "one million, one hundred sixty-five thousand, six hundred forty-two".