1242145 has 8 divisors (see below), whose sum is σ = 1512000. Its totient is φ = 979440.

The previous prime is 1242121. The next prime is 1242151. The reversal of 1242145 is 5412421.

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

It is not a de Polignac number, because 1242145 - 2¹¹ = 1240097 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1395 + ... + 2104.

It is an arithmetic number, because the mean of its divisors is an integer number (189000).

2^1242145 is an apocalyptic number.

It is an amenable number.

1242145 is a deficient number, since it is larger than the sum of its proper divisors (269855).

1242145 is an equidigital number, since it uses as much as digits as its factorization.

1242145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3575.

The product of its digits is 320, while the sum is 19.

The square root of 1242145 is about 1114.5155898416. The cubic root of 1242145 is about 107.4956190751.

Adding to 1242145 its reverse (5412421), we get a palindrome (6654566).

The spelling of 1242145 in words is "one million, two hundred forty-two thousand, one hundred forty-five".