1405925 has 6 divisors (see below), whose sum is σ = 1743378. Its totient is φ = 1124720.

The previous prime is 1405919. The next prime is 1405927. The reversal of 1405925 is 5295041.

It can be written as a sum of positive squares in 3 ways, for example, as 101761 + 1304164 = 319^2 + 1142^2 .

It is not a de Polignac number, because 1405925 - 2⁸ = 1405669 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1405894 and 1405903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1405927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 28094 + ... + 28143.

It is an arithmetic number, because the mean of its divisors is an integer number (290563).

2^1405925 is an apocalyptic number.

It is an amenable number.

1405925 is a deficient number, since it is larger than the sum of its proper divisors (337453).

1405925 is an equidigital number, since it uses as much as digits as its factorization.

1405925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56247 (or 56242 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 1405925 is about 1185.7170826129. The cubic root of 1405925 is about 112.0264871454.

The spelling of 1405925 in words is "one million, four hundred five thousand, nine hundred twenty-five".