1625321 has 2 divisors, whose sum is σ = 1625322. Its totient is φ = 1625320.

The previous prime is 1625311. The next prime is 1625329. The reversal of 1625321 is 1235261.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1413721 + 211600 = 1189^2 + 460^2 .

It is a cyclic number.

It is not a de Polignac number, because 1625321 - 2⁶ = 1625257 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1625293 and 1625302.

It is not a weakly prime, because it can be changed into another prime (1625329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 812660 + 812661.

It is an arithmetic number, because the mean of its divisors is an integer number (812661).

2^1625321 is an apocalyptic number.

It is an amenable number.

1625321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1625321 is an equidigital number, since it uses as much as digits as its factorization.

1625321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 360, while the sum is 20.

The square root of 1625321 is about 1274.8807787397. The cubic root of 1625321 is about 117.5744751936.

The spelling of 1625321 in words is "one million, six hundred twenty-five thousand, three hundred twenty-one".