1005145123 has 2 divisors, whose sum is σ = 1005145124. Its totient is φ = 1005145122.

The previous prime is 1005145121. The next prime is 1005145153. The reversal of 1005145123 is 3215415001.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (3215415001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1005145123 - 2¹ = 1005145121 is a prime.

Together with 1005145121, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1005145094 and 1005145103.

It is not a weakly prime, because it can be changed into another prime (1005145121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 502572561 + 502572562.

It is an arithmetic number, because the mean of its divisors is an integer number (502572562).

Almost surely, 2^1005145123 is an apocalyptic number.

1005145123 is a deficient number, since it is larger than the sum of its proper divisors (1).

1005145123 is an equidigital number, since it uses as much as digits as its factorization.

1005145123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 1005145123 is about 31704.0237667082. The cubic root of 1005145123 is about 1001.7121080132.

The spelling of 1005145123 in words is "one billion, five million, one hundred forty-five thousand, one hundred twenty-three".