1425663 has 6 divisors (see below), whose sum is σ = 2059304. Its totient is φ = 950436.

The previous prime is 1425661. The next prime is 1425667. The reversal of 1425663 is 3665241.

It is not a de Polignac number, because 1425663 - 2¹ = 1425661 is a prime.

It is a d-powerful number, because it can be written as 1 + 4⁶ + 2¹⁹ + 5⁷ + 6⁵ + 6⁷ + 3¹² .

It is a Duffinian number.

It is a congruent 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 (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 79195 + ... + 79212.

2^1425663 is an apocalyptic number.

1425663 is a deficient number, since it is larger than the sum of its proper divisors (633641).

1425663 is a wasteful number, since it uses less digits than its factorization.

1425663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158413 (or 158410 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 1425663 is about 1194.0113064791. The cubic root of 1425663 is about 112.5483051817.

Subtracting from 1425663 its sum of digits (27), we obtain a square (1425636 = 1194²).

The spelling of 1425663 in words is "one million, four hundred twenty-five thousand, six hundred sixty-three".