1630025 has 12 divisors (see below), whose sum is σ = 2042652. Its totient is φ = 1290240.

The previous prime is 1630021. The next prime is 1630049. The reversal of 1630025 is 5200361.

It can be written as a sum of positive squares in 6 ways, for example, as 22201 + 1607824 = 149^2 + 1268^2 .

It is not a de Polignac number, because 1630025 - 2² = 1630021 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1629985 and 1630012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1630021) 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, 2537 + ... + 3113.

It is an arithmetic number, because the mean of its divisors is an integer number (170221).

2^1630025 is an apocalyptic number.

It is an amenable number.

1630025 is a deficient number, since it is larger than the sum of its proper divisors (412627).

1630025 is a wasteful number, since it uses less digits than its factorization.

1630025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 700 (or 695 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 1630025 is about 1276.7243241985. The cubic root of 1630025 is about 117.6877938596.

Adding to 1630025 its reverse (5200361), we get a palindrome (6830386).

The spelling of 1630025 in words is "one million, six hundred thirty thousand, twenty-five".