1025672209 has 2 divisors, whose sum is σ = 1025672210. Its totient is φ = 1025672208.

The previous prime is 1025672183. The next prime is 1025672279. The reversal of 1025672209 is 9022765201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1019397184 + 6275025 = 31928^2 + 2505^2 .

It is a cyclic number.

It is not a de Polignac number, because 1025672209 - 2¹⁵ = 1025639441 is a prime.

It is not a weakly prime, because it can be changed into another prime (1025672279) 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 as a sum of consecutive naturals, namely, 512836104 + 512836105.

It is an arithmetic number, because the mean of its divisors is an integer number (512836105).

Almost surely, 2^1025672209 is an apocalyptic number.

It is an amenable number.

1025672209 is a deficient number, since it is larger than the sum of its proper divisors (1).

1025672209 is an equidigital number, since it uses as much as digits as its factorization.

1025672209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 1025672209 is about 32026.1176073529. The cubic root of 1025672209 is about 1008.4852007277.

The spelling of 1025672209 in words is "one billion, twenty-five million, six hundred seventy-two thousand, two hundred nine".