1382865 has 48 divisors (see below), whose sum is σ = 2652480. Its totient is φ = 609280.

The previous prime is 1382861. The next prime is 1382891. The reversal of 1382865 is 5682831.

1382865 = 125² + 126² + ... + 182².

It is a happy number.

It is not a de Polignac number, because 1382865 - 2² = 1382861 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an Ulam number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1382861) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 47671 + ... + 47699.

It is an arithmetic number, because the mean of its divisors is an integer number (55260).

2^1382865 is an apocalyptic number.

1382865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1382865 is a deficient number, since it is larger than the sum of its proper divisors (1269615).

1382865 is a wasteful number, since it uses less digits than its factorization.

1382865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82 (or 65 counting only the distinct ones).

The product of its digits is 11520, while the sum is 33.

The square root of 1382865 is about 1175.9528051754. The cubic root of 1382865 is about 111.4106209931.

1382865 divided by its sum of digits (33) gives a triangular number (41905 = T₂₈₉).

It can be divided in two parts, 138 and 2865, that added together give a palindrome (3003).

The spelling of 1382865 in words is "one million, three hundred eighty-two thousand, eight hundred sixty-five".