1256231263 has 8 divisors (see below), whose sum is σ = 1435911840. Its totient is φ = 1076605440.

The previous prime is 1256231209. The next prime is 1256231279. The reversal of 1256231263 is 3621326521.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1256231263 - 2¹³ = 1256223071 is a prime.

It is a super-2 number, since 2×1256231263² = 3156233972277150338, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1256231203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67983 + ... + 84463.

It is an arithmetic number, because the mean of its divisors is an integer number (179488980).

Almost surely, 2^1256231263 is an apocalyptic number.

1256231263 is a deficient number, since it is larger than the sum of its proper divisors (179680577).

1256231263 is a wasteful number, since it uses less digits than its factorization.

1256231263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27377.

The product of its digits is 12960, while the sum is 31.

The square root of 1256231263 is about 35443.3528746929. The cubic root of 1256231263 is about 1079.0043587592.

Adding to 1256231263 its reverse (3621326521), we get a palindrome (4877557784).

The spelling of 1256231263 in words is "one billion, two hundred fifty-six million, two hundred thirty-one thousand, two hundred sixty-three".