1630325 has 6 divisors (see below), whose sum is σ = 2021634. Its totient is φ = 1304240.

The previous prime is 1630303. The next prime is 1630357. The reversal of 1630325 is 5230361.

It can be written as a sum of positive squares in 3 ways, for example, as 14884 + 1615441 = 122^2 + 1271^2 .

It is not a de Polignac number, because 1630325 - 2⁶ = 1630261 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1630297 and 1630306.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 32582 + ... + 32631.

It is an arithmetic number, because the mean of its divisors is an integer number (336939).

2^1630325 is an apocalyptic number.

It is an amenable number.

1630325 is a deficient number, since it is larger than the sum of its proper divisors (391309).

1630325 is an equidigital number, since it uses as much as digits as its factorization.

1630325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65223 (or 65218 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 20.

The square root of 1630325 is about 1276.8418069597. The cubic root of 1630325 is about 117.6950134161.

Adding to 1630325 its reverse (5230361), we get a palindrome (6860686).

The spelling of 1630325 in words is "one million, six hundred thirty thousand, three hundred twenty-five".