1206246645 has 24 divisors (see below), whose sum is σ = 2213818776. Its totient is φ = 605488128.

The previous prime is 1206246593. The next prime is 1206246649. The reversal of 1206246645 is 5466426021.

1206246645 is a `hidden beast` number, since 1 + 2 + 0 + 6 + 2 + 4 + 6 + 645 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 240653169 + 965593476 = 15513^2 + 31074^2 .

It is not a de Polignac number, because 1206246645 - 2⁶ = 1206246581 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1206246649) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 787632 + ... + 789161.

It is an arithmetic number, because the mean of its divisors is an integer number (92242449).

Almost surely, 2^1206246645 is an apocalyptic number.

1206246645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1206246645 is a deficient number, since it is larger than the sum of its proper divisors (1007572131).

1206246645 is a wasteful number, since it uses less digits than its factorization.

1206246645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1576821 (or 1576818 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The square root of 1206246645 is about 34731.0616739541. The cubic root of 1206246645 is about 1064.4992819119.

The spelling of 1206246645 in words is "one billion, two hundred six million, two hundred forty-six thousand, six hundred forty-five".