1328625 has 24 divisors (see below), whose sum is σ = 2397096. Its totient is φ = 708000.

The previous prime is 1328617. The next prime is 1328647. The reversal of 1328625 is 5268231.

1328625 is a `hidden beast` number, since 1 + 32 + 8 + 625 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1521 + 1327104 = 39^2 + 1152^2 .

It is not a de Polignac number, because 1328625 - 2³ = 1328617 is a prime.

It is a d-powerful number, because it can be written as 1 + 3³ + 2⁴ + 8² + 6⁷ + 2²⁰ + 5 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 535 + ... + 1715.

It is an arithmetic number, because the mean of its divisors is an integer number (99879).

2^1328625 is an apocalyptic number.

1328625 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1328625 is a deficient number, since it is larger than the sum of its proper divisors (1068471).

1328625 is a wasteful number, since it uses less digits than its factorization.

1328625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1202 (or 1189 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 1328625 is about 1152.6599672063. The cubic root of 1328625 is about 109.9345340487.

It can be divided in two parts, 1328 and 625, that added together give a triangular number (1953 = T₆₂).

The spelling of 1328625 in words is "one million, three hundred twenty-eight thousand, six hundred twenty-five".