1303861 has 4 divisors (see below), whose sum is σ = 1404172. Its totient is φ = 1203552.

The previous prime is 1303859. The next prime is 1303867. The reversal of 1303861 is 1683031.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1683031 = 7 ⋅240433.

It can be written as a sum of positive squares in 2 ways, for example, as 820836 + 483025 = 906^2 + 695^2 .

It is a cyclic number.

It is not a de Polignac number, because 1303861 - 2¹ = 1303859 is a prime.

It is a Duffinian number.

1303861 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1303867) 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, 50136 + ... + 50161.

It is an arithmetic number, because the mean of its divisors is an integer number (351043).

2^1303861 is an apocalyptic number.

It is an amenable number.

1303861 is a deficient number, since it is larger than the sum of its proper divisors (100311).

1303861 is a wasteful number, since it uses less digits than its factorization.

1303861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100310.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 1303861 is about 1141.8673302972. The cubic root of 1303861 is about 109.2472294103.

Adding to 1303861 its reverse (1683031), we get a palindrome (2986892).

The spelling of 1303861 in words is "one million, three hundred three thousand, eight hundred sixty-one".