1421625 has 32 divisors (see below), whose sum is σ = 2515968. Its totient is φ = 710400.

The previous prime is 1421621. The next prime is 1421627. The reversal of 1421625 is 5261241.

It is not a de Polignac number, because 1421625 - 2² = 1421621 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421621) 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 31 ways as a sum of consecutive naturals, for example, 6264 + ... + 6486.

It is an arithmetic number, because the mean of its divisors is an integer number (78624).

2^1421625 is an apocalyptic number.

1421625 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1421625 is a deficient number, since it is larger than the sum of its proper divisors (1094343).

1421625 is a wasteful number, since it uses less digits than its factorization.

1421625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258 (or 248 counting only the distinct ones).

The product of its digits is 480, while the sum is 21.

The square root of 1421625 is about 1192.3191686793. The cubic root of 1421625 is about 112.4419453552.

Adding to 1421625 its reverse (5261241), we get a palindrome (6682866).

It can be divided in two parts, 14216 and 25, that added together give a palindrome (14241).

The spelling of 1421625 in words is "one million, four hundred twenty-one thousand, six hundred twenty-five".