1380015 has 48 divisors (see below), whose sum is σ = 2952768. Its totient is φ = 580608.

The previous prime is 1380013. The next prime is 1380031. The reversal of 1380015 is 5100831.

It is a happy number.

It is not a de Polignac number, because 1380015 - 2¹ = 1380013 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1380015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1380013) 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, 3927 + ... + 4263.

It is an arithmetic number, because the mean of its divisors is an integer number (61516).

2^1380015 is an apocalyptic number.

1380015 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1380015 is an abundant number, since it is smaller than the sum of its proper divisors (1572753).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1380015 is a wasteful number, since it uses less digits than its factorization.

1380015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368 (or 365 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 1380015 is about 1174.7403968537. The cubic root of 1380015 is about 111.3340315333.

Adding to 1380015 its reverse (5100831), we get a palindrome (6480846).

The spelling of 1380015 in words is "one million, three hundred eighty thousand, fifteen".