1440625 has 12 divisors (see below), whose sum is σ = 1804572. Its totient is φ = 1150000.

The previous prime is 1440623. The next prime is 1440641. The reversal of 1440625 is 5260441.

It can be written as a sum of positive squares in 6 ways, for example, as 1281424 + 159201 = 1132^2 + 399^2 .

It is not a de Polignac number, because 1440625 - 2¹ = 1440623 is a prime.

It is a Duffinian number.

1440625 is a lucky number.

It is a nialpdrome in base 5.

It is a junction number, because it is equal to n+sod(n) for n = 1440596 and 1440605.

It is not an unprimeable number, because it can be changed into a prime (1440623) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2895 + ... + 3355.

It is an arithmetic number, because the mean of its divisors is an integer number (150381).

2^1440625 is an apocalyptic number.

It is an amenable number.

1440625 is a deficient number, since it is larger than the sum of its proper divisors (363947).

1440625 is an frugal number, since it uses more digits than its factorization.

1440625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 486 (or 466 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 1440625 is about 1200.2603884158. The cubic root of 1440625 is about 112.9406585337.

The spelling of 1440625 in words is "one million, four hundred forty thousand, six hundred twenty-five".