1425665 has 16 divisors (see below), whose sum is σ = 1848000. Its totient is φ = 1052352.

The previous prime is 1425661. The next prime is 1425667. The reversal of 1425665 is 5665241.

It is a cyclic number.

It is not a de Polignac number, because 1425665 - 2² = 1425661 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1425661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3911 + ... + 4259.

It is an arithmetic number, because the mean of its divisors is an integer number (115500).

2^1425665 is an apocalyptic number.

It is an amenable number.

1425665 is a deficient number, since it is larger than the sum of its proper divisors (422335).

1425665 is a wasteful number, since it uses less digits than its factorization.

1425665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416.

The product of its digits is 7200, while the sum is 29.

The square root of 1425665 is about 1194.0121439918. The cubic root of 1425665 is about 112.5483578114.

Subtracting from 1425665 its sum of digits (29), we obtain a square (1425636 = 1194²).

The spelling of 1425665 in words is "one million, four hundred twenty-five thousand, six hundred sixty-five".