1143505 has 16 divisors (see below), whose sum is σ = 1586304. Its totient is φ = 782080.

The previous prime is 1143487. The next prime is 1143529. The reversal of 1143505 is 5053411.

It is not a de Polignac number, because 1143505 - 2⁵ = 1143473 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 324 + ... + 1546.

It is an arithmetic number, because the mean of its divisors is an integer number (99144).

2^1143505 is an apocalyptic number.

It is an amenable number.

1143505 is a deficient number, since it is larger than the sum of its proper divisors (442799).

1143505 is a wasteful number, since it uses less digits than its factorization.

1143505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1256.

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 1143505 is about 1069.3479321530. The cubic root of 1143505 is about 104.5713438776.

Adding to 1143505 its reverse (5053411), we get a palindrome (6196916).

The spelling of 1143505 in words is "one million, one hundred forty-three thousand, five hundred five".