1440047 has 4 divisors (see below), whose sum is σ = 1645776. Its totient is φ = 1234320.

The previous prime is 1440037. The next prime is 1440079. The reversal of 1440047 is 7400441.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7400441 = 107 ⋅69163.

It is a cyclic number.

It is not a de Polignac number, because 1440047 - 2⁸ = 1439791 is a prime.

It is an Ulam 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 (1440017) 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, 102854 + ... + 102867.

It is an arithmetic number, because the mean of its divisors is an integer number (411444).

2^1440047 is an apocalyptic number.

1440047 is a deficient number, since it is larger than the sum of its proper divisors (205729).

1440047 is an equidigital number, since it uses as much as digits as its factorization.

1440047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205728.

The product of its (nonzero) digits is 448, while the sum is 20.

The square root of 1440047 is about 1200.0195831735. The cubic root of 1440047 is about 112.9255520272.

Adding to 1440047 its reverse (7400441), we get a palindrome (8840488).

The spelling of 1440047 in words is "one million, four hundred forty thousand, forty-seven".