1425605 has 4 divisors (see below), whose sum is σ = 1710732. Its totient is φ = 1140480.

The previous prime is 1425601. The next prime is 1425607. The reversal of 1425605 is 5065241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5065241 = 83 ⋅61027.

It can be written as a sum of positive squares in 2 ways, for example, as 244036 + 1181569 = 494^2 + 1087^2 .

It is not a de Polignac number, because 1425605 - 2² = 1425601 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1425601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 142556 + ... + 142565.

It is an arithmetic number, because the mean of its divisors is an integer number (427683).

2^1425605 is an apocalyptic number.

It is an amenable number.

1425605 is a deficient number, since it is larger than the sum of its proper divisors (285127).

1425605 is an equidigital number, since it uses as much as digits as its factorization.

1425605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285126.

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

The square root of 1425605 is about 1193.9870183549. The cubic root of 1425605 is about 112.5467789000.

The spelling of 1425605 in words is "one million, four hundred twenty-five thousand, six hundred five".