1303965 has 32 divisors (see below), whose sum is σ = 2499840. Its totient is φ = 641088.

The previous prime is 1303963. The next prime is 1303979. The reversal of 1303965 is 5693031.

It is not a de Polignac number, because 1303965 - 2¹ = 1303963 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1303961) 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 31 ways as a sum of consecutive naturals, for example, 1384 + ... + 2126.

It is an arithmetic number, because the mean of its divisors is an integer number (78120).

2^1303965 is an apocalyptic number.

1303965 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1303965 is a deficient number, since it is larger than the sum of its proper divisors (1195875).

1303965 is a wasteful number, since it uses less digits than its factorization.

1303965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 770 (or 764 counting only the distinct ones).

The product of its (nonzero) digits is 2430, while the sum is 27.

The square root of 1303965 is about 1141.9128688302. The cubic root of 1303965 is about 109.2501339657.

Adding to 1303965 its reverse (5693031), we get a palindrome (6996996).

It can be divided in two parts, 130 and 3965, that added together give a triangular number (4095 = T₉₀).

The spelling of 1303965 in words is "one million, three hundred three thousand, nine hundred sixty-five".