4122551261 has 2 divisors, whose sum is σ = 4122551262. Its totient is φ = 4122551260.

The previous prime is 4122551243. The next prime is 4122551273. The reversal of 4122551261 is 1621552214.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4064700025 + 57851236 = 63755^2 + 7606^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4122551261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4122551291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2061275630 + 2061275631.

It is an arithmetic number, because the mean of its divisors is an integer number (2061275631).

Almost surely, 2^4122551261 is an apocalyptic number.

It is an amenable number.

4122551261 is a deficient number, since it is larger than the sum of its proper divisors (1).

4122551261 is an equidigital number, since it uses as much as digits as its factorization.

4122551261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4800, while the sum is 29.

The square root of 4122551261 is about 64207.0966560551. The cubic root of 4122551261 is about 1603.4497521035.

The spelling of 4122551261 in words is "four billion, one hundred twenty-two million, five hundred fifty-one thousand, two hundred sixty-one".