1625747 has 2 divisors, whose sum is σ = 1625748. Its totient is φ = 1625746.

The previous prime is 1625719. The next prime is 1625749. The reversal of 1625747 is 7475261.

It is a strong prime.

It is an emirp because it is prime and its reverse (7475261) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1625747 - 2¹⁶ = 1560211 is a prime.

Together with 1625749, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1625749) 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, 812873 + 812874.

It is an arithmetic number, because the mean of its divisors is an integer number (812874).

2^1625747 is an apocalyptic number.

1625747 is a deficient number, since it is larger than the sum of its proper divisors (1).

1625747 is an equidigital number, since it uses as much as digits as its factorization.

1625747 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11760, while the sum is 32.

The square root of 1625747 is about 1275.0478422397. The cubic root of 1625747 is about 117.5847464675.

The spelling of 1625747 in words is "one million, six hundred twenty-five thousand, seven hundred forty-seven".