1427605 has 4 divisors (see below), whose sum is σ = 1713132. Its totient is φ = 1142080.

The previous prime is 1427599. The next prime is 1427617. The reversal of 1427605 is 5067241.

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

It can be written as a sum of positive squares in 2 ways, for example, as 439569 + 988036 = 663^2 + 994^2 .

It is not a de Polignac number, because 1427605 - 2⁹ = 1427093 is a prime.

It is a Duffinian number.

1427605 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1427605.

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, 142756 + ... + 142765.

It is an arithmetic number, because the mean of its divisors is an integer number (428283).

2^1427605 is an apocalyptic number.

It is an amenable number.

1427605 is a deficient number, since it is larger than the sum of its proper divisors (285527).

1427605 is an equidigital number, since it uses as much as digits as its factorization.

1427605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285526.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 1427605 is about 1194.8242548593. The cubic root of 1427605 is about 112.5993854255.

The spelling of 1427605 in words is "one million, four hundred twenty-seven thousand, six hundred five".