1630825 has 12 divisors (see below), whose sum is σ = 2311360. Its totient is φ = 1118160.

The previous prime is 1630813. The next prime is 1630829. The reversal of 1630825 is 5280361.

1630825 = T₂₃₀ + T₂₃₁ + ... + T₂₇₉.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-1630825 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a self number, because there is not a number n which added to its sum of digits gives 1630825.

It is not an unprimeable number, because it can be changed into a prime (1630829) 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, 4485 + ... + 4834.

2^1630825 is an apocalyptic number.

It is an amenable number.

1630825 is a deficient number, since it is larger than the sum of its proper divisors (680535).

1630825 is an equidigital number, since it uses as much as digits as its factorization.

1630825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9336 (or 9331 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 1630825 is about 1277.0375875439. The cubic root of 1630825 is about 117.7070440422.

The spelling of 1630825 in words is "one million, six hundred thirty thousand, eight hundred twenty-five".