1440457 has 8 divisors (see below), whose sum is σ = 1490720. Its totient is φ = 1391040.

The previous prime is 1440449. The next prime is 1440469. The reversal of 1440457 is 7540441.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1440457 - 2³ = 1440449 is a prime.

It is a Duffinian number.

1440457 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1440437) 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 7 ways as a sum of consecutive naturals, for example, 5857 + ... + 6097.

It is an arithmetic number, because the mean of its divisors is an integer number (186340).

2^1440457 is an apocalyptic number.

It is an amenable number.

1440457 is a deficient number, since it is larger than the sum of its proper divisors (50263).

1440457 is a wasteful number, since it uses less digits than its factorization.

1440457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423.

The product of its (nonzero) digits is 2240, while the sum is 25.

The square root of 1440457 is about 1200.1904015614. The cubic root of 1440457 is about 112.9362681318.

Adding to 1440457 its reverse (7540441), we get a palindrome (8980898).

The spelling of 1440457 in words is "one million, four hundred forty thousand, four hundred fifty-seven".