1208256971 has 4 divisors (see below), whose sum is σ = 1208328672. Its totient is φ = 1208185272.

The previous prime is 1208256937. The next prime is 1208256977. The reversal of 1208256971 is 1796528021.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1796528021 = 199 ⋅9027779.

It is a cyclic number.

It is not a de Polignac number, because 1208256971 - 2²² = 1204062667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1208256977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4766 + ... + 49388.

It is an arithmetic number, because the mean of its divisors is an integer number (302082168).

Almost surely, 2^1208256971 is an apocalyptic number.

1208256971 is a deficient number, since it is larger than the sum of its proper divisors (71701).

1208256971 is an equidigital number, since it uses as much as digits as its factorization.

1208256971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71700.

The product of its (nonzero) digits is 60480, while the sum is 41.

The square root of 1208256971 is about 34759.9909522428. The cubic root of 1208256971 is about 1065.0903171584.

The spelling of 1208256971 in words is "one billion, two hundred eight million, two hundred fifty-six thousand, nine hundred seventy-one".