2566121429 has 2 divisors, whose sum is σ = 2566121430. Its totient is φ = 2566121428.

The previous prime is 2566121413. The next prime is 2566121473. The reversal of 2566121429 is 9241216652.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2558842225 + 7279204 = 50585^2 + 2698^2 .

It is a cyclic number.

It is not a de Polignac number, because 2566121429 - 2⁴ = 2566121413 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2566121392 and 2566121401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2566121479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1283060714 + 1283060715.

It is an arithmetic number, because the mean of its divisors is an integer number (1283060715).

Almost surely, 2^2566121429 is an apocalyptic number.

It is an amenable number.

2566121429 is a deficient number, since it is larger than the sum of its proper divisors (1).

2566121429 is an equidigital number, since it uses as much as digits as its factorization.

2566121429 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51840, while the sum is 38.

The square root of 2566121429 is about 50656.8991253906. The cubic root of 2566121429 is about 1369.0702536102.

The spelling of 2566121429 in words is "two billion, five hundred sixty-six million, one hundred twenty-one thousand, four hundred twenty-nine".