1242165 has 8 divisors (see below), whose sum is σ = 1987488. Its totient is φ = 662480.

The previous prime is 1242151. The next prime is 1242167. The reversal of 1242165 is 5612421.

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

It is not a de Polignac number, because 1242165 - 2¹¹ = 1240117 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242167) by changing a digit.

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, 41391 + ... + 41420.

It is an arithmetic number, because the mean of its divisors is an integer number (248436).

2^1242165 is an apocalyptic number.

1242165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1242165 is a deficient number, since it is larger than the sum of its proper divisors (745323).

1242165 is an equidigital number, since it uses as much as digits as its factorization.

1242165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82819.

The product of its digits is 480, while the sum is 21.

The square root of 1242165 is about 1114.5245623135. The cubic root of 1242165 is about 107.4961960075.

Adding to 1242165 its reverse (5612421), we get a palindrome (6854586).

The spelling of 1242165 in words is "one million, two hundred forty-two thousand, one hundred sixty-five".