1243261 has 4 divisors (see below), whose sum is σ = 1316412. Its totient is φ = 1170112.

The previous prime is 1243211. The next prime is 1243271. The reversal of 1243261 is 1623421.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 962361 + 280900 = 981^2 + 530^2 .

It is a cyclic number.

It is not a de Polignac number, because 1243261 - 2⁷ = 1243133 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36550 + ... + 36583.

It is an arithmetic number, because the mean of its divisors is an integer number (329103).

2^1243261 is an apocalyptic number.

It is an amenable number.

1243261 is a deficient number, since it is larger than the sum of its proper divisors (73151).

1243261 is an equidigital number, since it uses as much as digits as its factorization.

1243261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73150.

The product of its digits is 288, while the sum is 19.

The square root of 1243261 is about 1115.0161433809. The cubic root of 1243261 is about 107.5278024357.

Adding to 1243261 its reverse (1623421), we get a palindrome (2866682).

It can be divided in two parts, 1243 and 261, that multiplied together give a palindrome (324423).

The spelling of 1243261 in words is "one million, two hundred forty-three thousand, two hundred sixty-one".