1206256231 has 4 divisors (see below), whose sum is σ = 1218199464. Its totient is φ = 1194313000.

The previous prime is 1206256201. The next prime is 1206256243. The reversal of 1206256231 is 1326526021.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1206256231 - 2¹¹ = 1206254183 is a prime.

It is a super-2 number, since 2×1206256231² = 2910108189652650722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1206256231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1206256201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5971465 + ... + 5971666.

It is an arithmetic number, because the mean of its divisors is an integer number (304549866).

Almost surely, 2^1206256231 is an apocalyptic number.

1206256231 is a deficient number, since it is larger than the sum of its proper divisors (11943233).

1206256231 is a wasteful number, since it uses less digits than its factorization.

1206256231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11943232.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 1206256231 is about 34731.1996769475. The cubic root of 1206256231 is about 1064.5021017507.

The spelling of 1206256231 in words is "one billion, two hundred six million, two hundred fifty-six thousand, two hundred thirty-one".