1206445513 has 12 divisors (see below), whose sum is σ = 1511372100. Its totient is φ = 954549792.

The previous prime is 1206445447. The next prime is 1206445531. The reversal of 1206445513 is 3155446021.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 381147529 + 825297984 = 19523^2 + 28728^2 .

It is not a de Polignac number, because 1206445513 - 2²¹ = 1204348361 is a prime.

It is a super-3 number, since 3×1206445513³ (a number of 28 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1206445813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 946338 + ... + 947611.

It is an arithmetic number, because the mean of its divisors is an integer number (125947675).

Almost surely, 2^1206445513 is an apocalyptic number.

1206445513 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1206445513 is a deficient number, since it is larger than the sum of its proper divisors (304926587).

1206445513 is a wasteful number, since it uses less digits than its factorization.

1206445513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1893976 (or 1893969 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 1206445513 is about 34733.9245263186. The cubic root of 1206445513 is about 1064.5577782986.

The spelling of 1206445513 in words is "one billion, two hundred six million, four hundred forty-five thousand, five hundred thirteen".