1298421161 has 2 divisors, whose sum is σ = 1298421162. Its totient is φ = 1298421160.

The previous prime is 1298421109. The next prime is 1298421167. The reversal of 1298421161 is 1611248921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1024320025 + 274101136 = 32005^2 + 16556^2 .

It is an emirp because it is prime and its reverse (1611248921) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1298421161 is a prime.

It is a super-2 number, since 2×1298421161² = 3371795022665175842, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1298421167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 649210580 + 649210581.

It is an arithmetic number, because the mean of its divisors is an integer number (649210581).

Almost surely, 2^1298421161 is an apocalyptic number.

It is an amenable number.

1298421161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1298421161 is an equidigital number, since it uses as much as digits as its factorization.

1298421161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6912, while the sum is 35.

The square root of 1298421161 is about 36033.6115453336. The cubic root of 1298421161 is about 1090.9508749339.

The spelling of 1298421161 in words is "one billion, two hundred ninety-eight million, four hundred twenty-one thousand, one hundred sixty-one".