1625005 has 4 divisors (see below), whose sum is σ = 1950012. Its totient is φ = 1300000.

The previous prime is 1624993. The next prime is 1625017. The reversal of 1625005 is 5005261.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1624993) and next prime (1625017).

It can be written as a sum of positive squares in 2 ways, for example, as 1110916 + 514089 = 1054^2 + 717^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1625005 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 162496 + ... + 162505.

It is an arithmetic number, because the mean of its divisors is an integer number (487503).

2^1625005 is an apocalyptic number.

It is an amenable number.

1625005 is a deficient number, since it is larger than the sum of its proper divisors (325007).

1625005 is an equidigital number, since it uses as much as digits as its factorization.

1625005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325006.

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 1625005 is about 1274.7568395580. The cubic root of 1625005 is about 117.5668549672.

The spelling of 1625005 in words is "one million, six hundred twenty-five thousand, five".