1243065 has 16 divisors (see below), whose sum is σ = 2016000. Its totient is φ = 653952.

The previous prime is 1243013. The next prime is 1243093. The reversal of 1243065 is 5603421.

It is a happy number.

It is not a de Polignac number, because 1243065 - 2⁷ = 1242937 is a prime.

1243065 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 661 + ... + 1709.

It is an arithmetic number, because the mean of its divisors is an integer number (126000).

2^1243065 is an apocalyptic number.

1243065 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1243065 is a deficient number, since it is larger than the sum of its proper divisors (772935).

1243065 is a wasteful number, since it uses less digits than its factorization.

1243065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1136.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 1243065 is about 1114.9282488125. The cubic root of 1243065 is about 107.5221515555.

Adding to 1243065 its reverse (5603421), we get a palindrome (6846486).

The spelling of 1243065 in words is "one million, two hundred forty-three thousand, sixty-five".