1143949 has 2 divisors, whose sum is σ = 1143950. Its totient is φ = 1143948.

The previous prime is 1143943. The next prime is 1143953. The reversal of 1143949 is 9493411.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 777924 + 366025 = 882^2 + 605^2 .

It is a cyclic number.

It is not a de Polignac number, because 1143949 - 2¹¹ = 1141901 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1143949.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1143943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 571974 + 571975.

It is an arithmetic number, because the mean of its divisors is an integer number (571975).

2^1143949 is an apocalyptic number.

It is an amenable number.

1143949 is a deficient number, since it is larger than the sum of its proper divisors (1).

1143949 is an equidigital number, since it uses as much as digits as its factorization.

1143949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3888, while the sum is 31.

The square root of 1143949 is about 1069.5555151557. Note that the first 4 decimals coincide. The cubic root of 1143949 is about 104.5848764430.

The spelling of 1143949 in words is "one million, one hundred forty-three thousand, nine hundred forty-nine".