1208628251 has 4 divisors (see below), whose sum is σ = 1216740000. Its totient is φ = 1200516504.

The previous prime is 1208628229. The next prime is 1208628259. The reversal of 1208628251 is 1528268021.

It is a happy number.

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 1208628251 - 2²⁶ = 1141519387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1208628259) 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, 4055651 + ... + 4055948.

It is an arithmetic number, because the mean of its divisors is an integer number (304185000).

Almost surely, 2^1208628251 is an apocalyptic number.

1208628251 is a deficient number, since it is larger than the sum of its proper divisors (8111749).

1208628251 is an equidigital number, since it uses as much as digits as its factorization.

1208628251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8111748.

The product of its (nonzero) digits is 15360, while the sum is 35.

The square root of 1208628251 is about 34765.3311648257. The cubic root of 1208628251 is about 1065.1994016342.

The spelling of 1208628251 in words is "one billion, two hundred eight million, six hundred twenty-eight thousand, two hundred fifty-one".