1440071 has 4 divisors (see below), whose sum is σ = 1459872. Its totient is φ = 1420272.

The previous prime is 1440037. The next prime is 1440079. The reversal of 1440071 is 1700441.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1440071 - 2¹⁰ = 1439047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1440079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9791 + ... + 9936.

It is an arithmetic number, because the mean of its divisors is an integer number (364968).

2^1440071 is an apocalyptic number.

1440071 is a deficient number, since it is larger than the sum of its proper divisors (19801).

1440071 is an equidigital number, since it uses as much as digits as its factorization.

1440071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19800.

The product of its (nonzero) digits is 112, while the sum is 17.

The square root of 1440071 is about 1200.0295829687. The cubic root of 1440071 is about 112.9261793674.

The spelling of 1440071 in words is "one million, four hundred forty thousand, seventy-one".