1405625 has 20 divisors (see below), whose sum is σ = 1902516. Its totient is φ = 1032000.

The previous prime is 1405597. The next prime is 1405631. The reversal of 1405625 is 5265041.

It can be written as a sum of positive squares in 10 ways, for example, as 1026169 + 379456 = 1013^2 + 616^2 .

It is not a de Polignac number, because 1405625 - 2⁶ = 1405561 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1405625.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 8039 + ... + 8211.

2^1405625 is an apocalyptic number.

It is an amenable number.

1405625 is a deficient number, since it is larger than the sum of its proper divisors (496891).

1405625 is an equidigital number, since it uses as much as digits as its factorization.

1405625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206 (or 191 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 1405625 is about 1185.5905701379. The cubic root of 1405625 is about 112.0185184090.

The spelling of 1405625 in words is "one million, four hundred five thousand, six hundred twenty-five".