1625791 has 2 divisors, whose sum is σ = 1625792. Its totient is φ = 1625790.

The previous prime is 1625759. The next prime is 1625803. The reversal of 1625791 is 1975261.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1625791 - 2⁵ = 1625759 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1622791) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 812895 + 812896.

It is an arithmetic number, because the mean of its divisors is an integer number (812896).

2^1625791 is an apocalyptic number.

1625791 is a deficient number, since it is larger than the sum of its proper divisors (1).

1625791 is an equidigital number, since it uses as much as digits as its factorization.

1625791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3780, while the sum is 31.

The square root of 1625791 is about 1275.0650963774. The cubic root of 1625791 is about 117.5858072480.

The spelling of 1625791 in words is "one million, six hundred twenty-five thousand, seven hundred ninety-one".