1243145 has 8 divisors (see below), whose sum is σ = 1506120. Its totient is φ = 984960.

The previous prime is 1243141. The next prime is 1243147. The reversal of 1243145 is 5413421.

It can be written as a sum of positive squares in 4 ways, for example, as 259081 + 984064 = 509^2 + 992^2 .

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

It is not a de Polignac number, because 1243145 - 2² = 1243141 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1243141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 596 + ... + 1685.

It is an arithmetic number, because the mean of its divisors is an integer number (188265).

2^1243145 is an apocalyptic number.

It is an amenable number.

1243145 is a deficient number, since it is larger than the sum of its proper divisors (262975).

1243145 is a wasteful number, since it uses less digits than its factorization.

1243145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2395.

The product of its digits is 480, while the sum is 20.

The square root of 1243145 is about 1114.9641249834. The cubic root of 1243145 is about 107.5244581090.

Adding to 1243145 its reverse (5413421), we get a palindrome (6656566).

The spelling of 1243145 in words is "one million, two hundred forty-three thousand, one hundred forty-five".