1425621 has 4 divisors (see below), whose sum is σ = 1900832. Its totient is φ = 950412.

The previous prime is 1425607. The next prime is 1425629. The reversal of 1425621 is 1265241.

1425621 is nontrivially palindromic in base 4.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1425621 - 2¹⁴ = 1409237 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1425629) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 237601 + ... + 237606.

It is an arithmetic number, because the mean of its divisors is an integer number (475208).

2^1425621 is an apocalyptic number.

It is an amenable number.

1425621 is a deficient number, since it is larger than the sum of its proper divisors (475211).

1425621 is an equidigital number, since it uses as much as digits as its factorization.

1425621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 475210.

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

The square root of 1425621 is about 1193.9937185764. The cubic root of 1425621 is about 112.5471999473.

The spelling of 1425621 in words is "one million, four hundred twenty-five thousand, six hundred twenty-one".