1143425091 has 4 divisors (see below), whose sum is σ = 1524566792. Its totient is φ = 762283392.

The previous prime is 1143425089. The next prime is 1143425093. The reversal of 1143425091 is 1905243411.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1143425089) and next prime (1143425093).

It is not a de Polignac number, because 1143425091 - 2¹ = 1143425089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1143425093) 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, 190570846 + ... + 190570851.

It is an arithmetic number, because the mean of its divisors is an integer number (381141698).

Almost surely, 2^1143425091 is an apocalyptic number.

1143425091 is a deficient number, since it is larger than the sum of its proper divisors (381141701).

1143425091 is an equidigital number, since it uses as much as digits as its factorization.

1143425091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381141700.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 1143425091 is about 33814.5692121015. The cubic root of 1143425091 is about 1045.6890797914.

The spelling of 1143425091 in words is "one billion, one hundred forty-three million, four hundred twenty-five thousand, ninety-one".