1440641 has 2 divisors, whose sum is σ = 1440642. Its totient is φ = 1440640.

The previous prime is 1440623. The next prime is 1440679. The reversal of 1440641 is 1460441.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 863041 + 577600 = 929^2 + 760^2 .

It is a cyclic number.

It is not a de Polignac number, because 1440641 - 2⁶ = 1440577 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1440611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 720320 + 720321.

It is an arithmetic number, because the mean of its divisors is an integer number (720321).

2^1440641 is an apocalyptic number.

It is an amenable number.

1440641 is a deficient number, since it is larger than the sum of its proper divisors (1).

1440641 is an equidigital number, since it uses as much as digits as its factorization.

1440641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 1440641 is about 1200.2670536177. The cubic root of 1440641 is about 112.9410766494.

The spelling of 1440641 in words is "one million, four hundred forty thousand, six hundred forty-one".