1256203229 has 2 divisors, whose sum is σ = 1256203230. Its totient is φ = 1256203228.

The previous prime is 1256203211. The next prime is 1256203231. The reversal of 1256203229 is 9223026521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 727111225 + 529092004 = 26965^2 + 23002^2 .

It is a cyclic number.

It is not a de Polignac number, because 1256203229 - 2⁸ = 1256202973 is a prime.

It is a Sophie Germain prime.

Together with 1256203231, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1256203195 and 1256203204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1256203129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 628101614 + 628101615.

It is an arithmetic number, because the mean of its divisors is an integer number (628101615).

Almost surely, 2^1256203229 is an apocalyptic number.

It is an amenable number.

1256203229 is a deficient number, since it is larger than the sum of its proper divisors (1).

1256203229 is an equidigital number, since it uses as much as digits as its factorization.

1256203229 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 1256203229 is about 35442.9573963573. The cubic root of 1256203229 is about 1078.9963323620.

The spelling of 1256203229 in words is "one billion, two hundred fifty-six million, two hundred three thousand, two hundred twenty-nine".