1380625 has 15 divisors (see below), whose sum is σ = 1762717.
Its totient is φ = 1081000.
The previous prime is 1380623. The next prime is 1380629. The reversal of 1380625 is 5260831.
Multipling 1380625 by its sum of digits (25), we get a square (34515625 = 58752).
1380625 divided by its sum of digits (25) gives a square (55225 = 2352).
It can be divided in two parts, 13806 and 25, that added together give a palindrome (13831).
It is a happy number.
The square root of 1380625 is 1175.
It is a perfect power (a square), and thus also a powerful number.
It can be written as a sum of positive squares in 2 ways, for example, as 108241 + 1272384 = 329^2 + 1128^2
It is not a de Polignac number, because 1380625 - 21 = 1380623 is a prime.
It is a super-2 number, since 2×13806252 = 3812250781250, which contains 22 as substring.
It is a Harshad number since it is a multiple of its sum of digits (25).
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 1380625.
It is not an unprimeable number, because it can be changed into a prime (1380623) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (7) of ones.
It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 29352 + ... + 29398.
21380625 is an apocalyptic number.
1380625 is the 1175-th square number.
1380625 is the 588-th centered octagonal number.
It is an amenable number.
1380625 is a deficient number, since it is larger than the sum of its proper divisors (382092).
1380625 is an frugal number, since it uses more digits than its factorization.
1380625 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 114 (or 52 counting only the distinct ones).
The product of its (nonzero) digits is 1440, while the sum is 25.
The cubic root of 1380625 is about 111.3504332283.
The spelling of 1380625 in words is "one million, three hundred eighty thousand, six hundred twenty-five".