1143745 has 16 divisors (see below), whose sum is σ = 1456128. Its totient is φ = 861120.

The previous prime is 1143719. The next prime is 1143749. The reversal of 1143745 is 5473411.

It is a de Polignac number, because none of the positive numbers 2^k-1143745 is a prime.

It is a Duffinian number.

Its product of digits (1680) is a multiple of the sum of its prime divisors (240).

It is not an unprimeable number, because it can be changed into a prime (1143749) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7207 + ... + 7363.

It is an arithmetic number, because the mean of its divisors is an integer number (91008).

2^1143745 is an apocalyptic number.

It is an amenable number.

1143745 is a deficient number, since it is larger than the sum of its proper divisors (312383).

1143745 is a wasteful number, since it uses less digits than its factorization.

1143745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240.

The product of its digits is 1680, while the sum is 25.

The square root of 1143745 is about 1069.4601441849. The cubic root of 1143745 is about 104.5786592127.

The spelling of 1143745 in words is "one million, one hundred forty-three thousand, seven hundred forty-five".