1625543 has 2 divisors, whose sum is σ = 1625544. Its totient is φ = 1625542.

The previous prime is 1625539. The next prime is 1625551. The reversal of 1625543 is 3455261.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1625543 - 2² = 1625539 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1625513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 812771 + 812772.

It is an arithmetic number, because the mean of its divisors is an integer number (812772).

2^1625543 is an apocalyptic number.

1625543 is a deficient number, since it is larger than the sum of its proper divisors (1).

1625543 is an equidigital number, since it uses as much as digits as its factorization.

1625543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3600, while the sum is 26.

The square root of 1625543 is about 1274.9678427317. The cubic root of 1625543 is about 117.5798280532.

The spelling of 1625543 in words is "one million, six hundred twenty-five thousand, five hundred forty-three".