1200666125 has 16 divisors (see below), whose sum is σ = 1563584256. Its totient is φ = 918768400.

The previous prime is 1200666109. The next prime is 1200666139. The reversal of 1200666125 is 5216660021.

It is not a de Polignac number, because 1200666125 - 2⁴ = 1200666109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 205937 + ... + 211686.

It is an arithmetic number, because the mean of its divisors is an integer number (97724016).

Almost surely, 2^1200666125 is an apocalyptic number.

It is an amenable number.

1200666125 is a deficient number, since it is larger than the sum of its proper divisors (362918131).

1200666125 is an equidigital number, since it uses as much as digits as its factorization.

1200666125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417661 (or 417651 counting only the distinct ones).

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

The square root of 1200666125 is about 34650.6295036613. The cubic root of 1200666125 is about 1062.8551615438.

The spelling of 1200666125 in words is "one billion, two hundred million, six hundred sixty-six thousand, one hundred twenty-five".