1440469 has 2 divisors, whose sum is σ = 1440470. Its totient is φ = 1440468.

The previous prime is 1440449. The next prime is 1440473. The reversal of 1440469 is 9640441.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 877969 + 562500 = 937^2 + 750^2 .

It is a cyclic number.

It is not a de Polignac number, because 1440469 - 2⁵ = 1440437 is a prime.

It is a super-2 number, since 2×1440469² = 4149901879922, which contains 22 as substring.

It is a Chen prime.

1440469 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1440419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 720234 + 720235.

It is an arithmetic number, because the mean of its divisors is an integer number (720235).

2^1440469 is an apocalyptic number.

It is an amenable number.

1440469 is a deficient number, since it is larger than the sum of its proper divisors (1).

1440469 is an equidigital number, since it uses as much as digits as its factorization.

1440469 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 1440469 is about 1200.1954007577. The cubic root of 1440469 is about 112.9365817433.

Subtracting from 1440469 its sum of digits (28), we obtain a palindrome (1440441).

The spelling of 1440469 in words is "one million, four hundred forty thousand, four hundred sixty-nine".