1000172125049 has 2 divisors, whose sum is σ = 1000172125050. Its totient is φ = 1000172125048.

The previous prime is 1000172125031. The next prime is 1000172125079. The reversal of 1000172125049 is 9405212710001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 950416361449 + 49755763600 = 974893^2 + 223060^2 .

It is an emirp because it is prime and its reverse (9405212710001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1000172125049 - 2¹² = 1000172120953 is a prime.

It is not a weakly prime, because it can be changed into another prime (1000172125019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500086062524 + 500086062525.

It is an arithmetic number, because the mean of its divisors is an integer number (500086062525).

Almost surely, 2^{1000172125049} is an apocalyptic number.

It is an amenable number.

1000172125049 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000172125049 is an equidigital number, since it uses as much as digits as its factorization.

1000172125049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 32.

The spelling of 1000172125049 in words is "one trillion, one hundred seventy-two million, one hundred twenty-five thousand, forty-nine".