1425221 has 8 divisors (see below), whose sum is σ = 1646400. Its totient is φ = 1208448.

The previous prime is 1425217. The next prime is 1425227. The reversal of 1425221 is 1225241.

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 1425221 - 2² = 1425217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1425221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1425227) 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 7 ways as a sum of consecutive naturals, for example, 371 + ... + 1728.

It is an arithmetic number, because the mean of its divisors is an integer number (205800).

2^1425221 is an apocalyptic number.

It is an amenable number.

1425221 is a deficient number, since it is larger than the sum of its proper divisors (221179).

1425221 is an equidigital number, since it uses as much as digits as its factorization.

1425221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2203.

The product of its digits is 160, while the sum is 17.

The square root of 1425221 is about 1193.8262017564. The cubic root of 1425221 is about 112.5366728177.

The spelling of 1425221 in words is "one million, four hundred twenty-five thousand, two hundred twenty-one".