1283965 has 8 divisors (see below), whose sum is σ = 1546848. Its totient is φ = 1023120.

The previous prime is 1283957. The next prime is 1283969. The reversal of 1283965 is 5693821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1283965 - 2³ = 1283957 is a prime.

It is a super-2 number, since 2×1283965² = 3297132242450, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1283965.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1283969) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2194 + ... + 2716.

It is an arithmetic number, because the mean of its divisors is an integer number (193356).

2^1283965 is an apocalyptic number.

It is an amenable number.

1283965 is a deficient number, since it is larger than the sum of its proper divisors (262883).

1283965 is an equidigital number, since it uses as much as digits as its factorization.

1283965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1019.

The product of its digits is 12960, while the sum is 34.

The square root of 1283965 is about 1133.1217939833. The cubic root of 1283965 is about 108.6887002046.

The spelling of 1283965 in words is "one million, two hundred eighty-three thousand, nine hundred sixty-five".