1321825 has 12 divisors (see below), whose sum is σ = 1684540. Its totient is φ = 1028160.

The previous prime is 1321823. The next prime is 1321841. The reversal of 1321825 is 5281231.

It can be written as a sum of positive squares in 6 ways, for example, as 40401 + 1281424 = 201^2 + 1132^2 .

It is not a de Polignac number, because 1321825 - 2¹ = 1321823 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1321796 and 1321805.

It is not an unprimeable number, because it can be changed into a prime (1321823) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 211 + ... + 1639.

2^1321825 is an apocalyptic number.

It is an amenable number.

1321825 is a deficient number, since it is larger than the sum of its proper divisors (362715).

1321825 is a wasteful number, since it uses less digits than its factorization.

1321825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1476 (or 1471 counting only the distinct ones).

The product of its digits is 480, while the sum is 22.

The square root of 1321825 is about 1149.7064842820. The cubic root of 1321825 is about 109.7466621719.

The spelling of 1321825 in words is "one million, three hundred twenty-one thousand, eight hundred twenty-five".