1425905 has 8 divisors (see below), whose sum is σ = 1842792. Its totient is φ = 1052928.

The previous prime is 1425899. The next prime is 1425911. The reversal of 1425905 is 5095241.

It is an interprime number because it is at equal distance from previous prime (1425899) and next prime (1425911).

It can be written as a sum of positive squares in 4 ways, for example, as 5041 + 1420864 = 71^2 + 1192^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1425905 - 2⁴ = 1425889 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10904 + ... + 11033.

It is an arithmetic number, because the mean of its divisors is an integer number (230349).

2^1425905 is an apocalyptic number.

It is an amenable number.

1425905 is a deficient number, since it is larger than the sum of its proper divisors (416887).

1425905 is a wasteful number, since it uses less digits than its factorization.

1425905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21955.

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

The square root of 1425905 is about 1194.1126412529. The cubic root of 1425905 is about 112.5546730141.

The spelling of 1425905 in words is "one million, four hundred twenty-five thousand, nine hundred five".