1143957 has 4 divisors (see below), whose sum is σ = 1525280. Its totient is φ = 762636.

The previous prime is 1143953. The next prime is 1143959. The reversal of 1143957 is 7593411.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1143957 - 2² = 1143953 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1143953) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 190657 + ... + 190662.

It is an arithmetic number, because the mean of its divisors is an integer number (381320).

2^1143957 is an apocalyptic number.

It is an amenable number.

1143957 is a deficient number, since it is larger than the sum of its proper divisors (381323).

1143957 is an equidigital number, since it uses as much as digits as its factorization.

1143957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381322.

The product of its digits is 3780, while the sum is 30.

The square root of 1143957 is about 1069.5592550205. The cubic root of 1143957 is about 104.5851202409.

The spelling of 1143957 in words is "one million, one hundred forty-three thousand, nine hundred fifty-seven".