1025655161 has 2 divisors, whose sum is σ = 1025655162. Its totient is φ = 1025655160.

The previous prime is 1025655097. The next prime is 1025655167. The reversal of 1025655161 is 1615565201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 543589225 + 482065936 = 23315^2 + 21956^2 .

It is a cyclic number.

It is not a de Polignac number, because 1025655161 - 2⁶ = 1025655097 is a prime.

It is not a weakly prime, because it can be changed into another prime (1025655167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 512827580 + 512827581.

It is an arithmetic number, because the mean of its divisors is an integer number (512827581).

Almost surely, 2^1025655161 is an apocalyptic number.

It is an amenable number.

1025655161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1025655161 is an equidigital number, since it uses as much as digits as its factorization.

1025655161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9000, while the sum is 32.

The square root of 1025655161 is about 32025.8514484783. The cubic root of 1025655161 is about 1008.4796132535.

The spelling of 1025655161 in words is "one billion, twenty-five million, six hundred fifty-five thousand, one hundred sixty-one".