1200868961 has 2 divisors, whose sum is σ = 1200868962. Its totient is φ = 1200868960.

The previous prime is 1200868957. The next prime is 1200868969. The reversal of 1200868961 is 1698680021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1187215936 + 13653025 = 34456^2 + 3695^2 .

It is an emirp because it is prime and its reverse (1698680021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1200868961 - 2² = 1200868957 is a prime.

It is a super-2 number, since 2×1200868961² = 2884172522986439042, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1200868969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600434480 + 600434481.

It is an arithmetic number, because the mean of its divisors is an integer number (600434481).

Almost surely, 2^1200868961 is an apocalyptic number.

It is an amenable number.

1200868961 is a deficient number, since it is larger than the sum of its proper divisors (1).

1200868961 is an equidigital number, since it uses as much as digits as its factorization.

1200868961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41472, while the sum is 41.

The square root of 1200868961 is about 34653.5562532909. The cubic root of 1200868961 is about 1062.9150097526.

The spelling of 1200868961 in words is "one billion, two hundred million, eight hundred sixty-eight thousand, nine hundred sixty-one".