1200666251 has 2 divisors, whose sum is σ = 1200666252. Its totient is φ = 1200666250.

The previous prime is 1200666227. The next prime is 1200666349. The reversal of 1200666251 is 1526660021.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1200666251 is a prime.

It is not a weakly prime, because it can be changed into another prime (1200666751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600333125 + 600333126.

It is an arithmetic number, because the mean of its divisors is an integer number (600333126).

Almost surely, 2^1200666251 is an apocalyptic number.

1200666251 is a deficient number, since it is larger than the sum of its proper divisors (1).

1200666251 is an equidigital number, since it uses as much as digits as its factorization.

1200666251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 1200666251 is about 34650.6313218100. The cubic root of 1200666251 is about 1062.8551987231.

The spelling of 1200666251 in words is "one billion, two hundred million, six hundred sixty-six thousand, two hundred fifty-one".