1254122161 has 2 divisors, whose sum is σ = 1254122162. Its totient is φ = 1254122160.

The previous prime is 1254122137. The next prime is 1254122183. The reversal of 1254122161 is 1612214521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1094352561 + 159769600 = 33081^2 + 12640^2 .

It is an emirp because it is prime and its reverse (1612214521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1254122161 - 2⁷ = 1254122033 is a prime.

It is a super-2 number, since 2×1254122161² = 3145644789422619842, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1254125161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 627061080 + 627061081.

It is an arithmetic number, because the mean of its divisors is an integer number (627061081).

Almost surely, 2^1254122161 is an apocalyptic number.

It is an amenable number.

1254122161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1254122161 is an equidigital number, since it uses as much as digits as its factorization.

1254122161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 960, while the sum is 25.

The square root of 1254122161 is about 35413.5872371043. The cubic root of 1254122161 is about 1078.4001693101.

Adding to 1254122161 its reverse (1612214521), we get a palindrome (2866336682).

The spelling of 1254122161 in words is "one billion, two hundred fifty-four million, one hundred twenty-two thousand, one hundred sixty-one".