1005121493 has 2 divisors, whose sum is σ = 1005121494. Its totient is φ = 1005121492.

The previous prime is 1005121477. The next prime is 1005121501. The reversal of 1005121493 is 3941215001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 524547409 + 480574084 = 22903^2 + 21922^2 .

It is a cyclic number.

It is not a de Polignac number, because 1005121493 - 2⁴ = 1005121477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1005121393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 502560746 + 502560747.

It is an arithmetic number, because the mean of its divisors is an integer number (502560747).

Almost surely, 2^1005121493 is an apocalyptic number.

It is an amenable number.

1005121493 is a deficient number, since it is larger than the sum of its proper divisors (1).

1005121493 is an equidigital number, since it uses as much as digits as its factorization.

1005121493 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 1005121493 is about 31703.6510988876. The cubic root of 1005121493 is about 1001.7042581874.

Adding to 1005121493 its reverse (3941215001), we get a palindrome (4946336494).

The spelling of 1005121493 in words is "one billion, five million, one hundred twenty-one thousand, four hundred ninety-three".