1425819 has 4 divisors (see below), whose sum is σ = 1901096. Its totient is φ = 950544.

The previous prime is 1425811. The next prime is 1425821. The reversal of 1425819 is 9185241.

It is a happy number.

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

It is not a de Polignac number, because 1425819 - 2³ = 1425811 is a prime.

It is a super-2 number, since 2×1425819² = 4065919641522, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1425811) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 237634 + ... + 237639.

It is an arithmetic number, because the mean of its divisors is an integer number (475274).

2^1425819 is an apocalyptic number.

1425819 is a deficient number, since it is larger than the sum of its proper divisors (475277).

1425819 is an equidigital number, since it uses as much as digits as its factorization.

1425819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 475276.

The product of its digits is 2880, while the sum is 30.

The square root of 1425819 is about 1194.0766307068. The cubic root of 1425819 is about 112.5524101479.

The spelling of 1425819 in words is "one million, four hundred twenty-five thousand, eight hundred nineteen".