1200664481 has 2 divisors, whose sum is σ = 1200664482. Its totient is φ = 1200664480.

The previous prime is 1200664433. The next prime is 1200664501. The reversal of 1200664481 is 1844660021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1184736400 + 15928081 = 34420^2 + 3991^2 .

It is a cyclic number.

It is not a de Polignac number, because 1200664481 - 2²⁶ = 1133555617 is a prime.

It is a super-2 number, since 2×1200664481² = 2883190391869998722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1200664411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600332240 + 600332241.

It is an arithmetic number, because the mean of its divisors is an integer number (600332241).

Almost surely, 2^1200664481 is an apocalyptic number.

It is an amenable number.

1200664481 is a deficient number, since it is larger than the sum of its proper divisors (1).

1200664481 is an equidigital number, since it uses as much as digits as its factorization.

1200664481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 1200664481 is about 34650.6057811404. The cubic root of 1200664481 is about 1062.8546764424.

The spelling of 1200664481 in words is "one billion, two hundred million, six hundred sixty-four thousand, four hundred eighty-one".