1261303 has 4 divisors (see below), whose sum is σ = 1269808. Its totient is φ = 1252800.

The previous prime is 1261301. The next prime is 1261313. The reversal of 1261303 is 3031621.

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

It is a cyclic number.

It is not a de Polignac number, because 1261303 - 2¹ = 1261301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1261301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4026 + ... + 4327.

It is an arithmetic number, because the mean of its divisors is an integer number (317452).

2^1261303 is an apocalyptic number.

1261303 is a deficient number, since it is larger than the sum of its proper divisors (8505).

1261303 is an equidigital number, since it uses as much as digits as its factorization.

1261303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8504.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 1261303 is about 1123.0774683876. The cubic root of 1261303 is about 108.0454484072.

Adding to 1261303 its reverse (3031621), we get a palindrome (4292924).

The spelling of 1261303 in words is "one million, two hundred sixty-one thousand, three hundred three".