1440747 has 54 divisors (see below), whose sum is σ = 2759484. Its totient is φ = 748440.

The previous prime is 1440737. The next prime is 1440763. The reversal of 1440747 is 7470441.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It is not a de Polignac number, because 1440747 - 2⁴ = 1440731 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 1440747.

It is not an unprimeable number, because it can be changed into a prime (1440707) by changing a digit.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 130972 + ... + 130982.

2^1440747 is an apocalyptic number.

1440747 is a deficient number, since it is larger than the sum of its proper divisors (1318737).

1440747 is an equidigital number, since it uses as much as digits as its factorization.

1440747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51 (or 21 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 27.

The square root of 1440747 is about 1200.3112096452. The cubic root of 1440747 is about 112.9438465878.

Multiplying 1440747 by its sum of digits (27), we get a square (38900169 = 6237²).

1440747 divided by its sum of digits (27) gives a square (53361 = 231²).

It can be divided in two parts, 1440 and 747, that added together give a 7-th power (2187 = 3⁷).

The spelling of 1440747 in words is "one million, four hundred forty thousand, seven hundred forty-seven".