1261323 has 12 divisors (see below), whose sum is σ = 2082288. Its totient is φ = 720720.

The previous prime is 1261321. The next prime is 1261327. The reversal of 1261323 is 3231621.

It is not a de Polignac number, because 1261323 - 2¹ = 1261321 is a prime.

It is a Smith number, since the sum of its digits (18) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 1261296 and 1261305.

It is not an unprimeable number, because it can be changed into a prime (1261321) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9948 + ... + 10073.

It is an arithmetic number, because the mean of its divisors is an integer number (173524).

2^1261323 is an apocalyptic number.

1261323 is a deficient number, since it is larger than the sum of its proper divisors (820965).

1261323 is a wasteful number, since it uses less digits than its factorization.

1261323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20034 (or 20031 counting only the distinct ones).

The product of its digits is 216, while the sum is 18.

The square root of 1261323 is about 1123.0863724576. The cubic root of 1261323 is about 108.0460194827.

Adding to 1261323 its reverse (3231621), we get a palindrome (4492944).

The spelling of 1261323 in words is "one million, two hundred sixty-one thousand, three hundred twenty-three".