1225076161 has 2 divisors, whose sum is σ = 1225076162. Its totient is φ = 1225076160.

The previous prime is 1225076159. The next prime is 1225076183. The reversal of 1225076161 is 1616705221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 760932225 + 464143936 = 27585^2 + 21544^2 .

It is a cyclic number.

It is not a de Polignac number, because 1225076161 - 2¹ = 1225076159 is a prime.

Together with 1225076159, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1225076861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 612538080 + 612538081.

It is an arithmetic number, because the mean of its divisors is an integer number (612538081).

Almost surely, 2^1225076161 is an apocalyptic number.

It is an amenable number.

1225076161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1225076161 is an equidigital number, since it uses as much as digits as its factorization.

1225076161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 1225076161 is about 35001.0879973752. The cubic root of 1225076161 is about 1070.0096546134.

The spelling of 1225076161 in words is "one billion, two hundred twenty-five million, seventy-six thousand, one hundred sixty-one".