1440129 has 4 divisors (see below), whose sum is σ = 1920176. Its totient is φ = 960084.

The previous prime is 1440119. The next prime is 1440203. The reversal of 1440129 is 9210441.

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 1440129 - 2¹⁵ = 1407361 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1440119) 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 3 ways as a sum of consecutive naturals, for example, 240019 + ... + 240024.

It is an arithmetic number, because the mean of its divisors is an integer number (480044).

2^1440129 is an apocalyptic number.

It is an amenable number.

1440129 is a deficient number, since it is larger than the sum of its proper divisors (480047).

1440129 is an equidigital number, since it uses as much as digits as its factorization.

1440129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 480046.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 1440129 is about 1200.0537487963. The cubic root of 1440129 is about 112.9276954108.

The spelling of 1440129 in words is "one million, four hundred forty thousand, one hundred twenty-nine".