1140457 has 4 divisors (see below), whose sum is σ = 1142596. Its totient is φ = 1138320.

The previous prime is 1140449. The next prime is 1140463. The reversal of 1140457 is 7540411.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 301401 + 839056 = 549^2 + 916^2 .

It is a cyclic number.

It is not a de Polignac number, because 1140457 - 2³ = 1140449 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1140487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 463 + ... + 1579.

It is an arithmetic number, because the mean of its divisors is an integer number (285649).

2^1140457 is an apocalyptic number.

It is an amenable number.

1140457 is a deficient number, since it is larger than the sum of its proper divisors (2139).

1140457 is a wasteful number, since it uses less digits than its factorization.

1140457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2138.

The product of its (nonzero) digits is 560, while the sum is 22.

The square root of 1140457 is about 1067.9218136175. The cubic root of 1140457 is about 104.4783499482.

Adding to 1140457 its reverse (7540411), we get a palindrome (8680868).

The spelling of 1140457 in words is "one million, one hundred forty thousand, four hundred fifty-seven".