1420625 has 10 divisors (see below), whose sum is σ = 1775994. Its totient is φ = 1136000.

The previous prime is 1420621. The next prime is 1420631. The reversal of 1420625 is 5260241.

It is a happy number.

It can be written as a sum of positive squares in 5 ways, for example, as 271441 + 1149184 = 521^2 + 1072^2 .

It is not a de Polignac number, because 1420625 - 2² = 1420621 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1420597 and 1420606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1420621) 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 9 ways as a sum of consecutive naturals, for example, 512 + ... + 1761.

2^1420625 is an apocalyptic number.

It is an amenable number.

1420625 is a deficient number, since it is larger than the sum of its proper divisors (355369).

1420625 is an frugal number, since it uses more digits than its factorization.

1420625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2293 (or 2278 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 1420625 is about 1191.8997441060. The cubic root of 1420625 is about 112.4155745189.

Adding to 1420625 its reverse (5260241), we get a palindrome (6680866).

The spelling of 1420625 in words is "one million, four hundred twenty thousand, six hundred twenty-five".