1421825 has 6 divisors (see below), whose sum is σ = 1763094. Its totient is φ = 1137440.

The previous prime is 1421813. The next prime is 1421857. The reversal of 1421825 is 5281241.

It can be written as a sum of positive squares in 3 ways, for example, as 961 + 1420864 = 31^2 + 1192^2 .

It is not a de Polignac number, because 1421825 - 2⁸ = 1421569 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1421825.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 28412 + ... + 28461.

It is an arithmetic number, because the mean of its divisors is an integer number (293849).

2^1421825 is an apocalyptic number.

It is an amenable number.

1421825 is a deficient number, since it is larger than the sum of its proper divisors (341269).

1421825 is an equidigital number, since it uses as much as digits as its factorization.

1421825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56883 (or 56878 counting only the distinct ones).

The product of its digits is 640, while the sum is 23.

The square root of 1421825 is about 1192.4030358901. The cubic root of 1421825 is about 112.4472180384.

The spelling of 1421825 in words is "one million, four hundred twenty-one thousand, eight hundred twenty-five".