1206145775 has 6 divisors (see below), whose sum is σ = 1495620792. Its totient is φ = 964916600.

The previous prime is 1206145753. The next prime is 1206145777. The reversal of 1206145775 is 5775416021.

It is not a de Polignac number, because 1206145775 - 2¹⁸ = 1205883631 is a prime.

It is a super-3 number, since 3×1206145775³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1206145777) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 24122891 + ... + 24122940.

It is an arithmetic number, because the mean of its divisors is an integer number (249270132).

Almost surely, 2^1206145775 is an apocalyptic number.

1206145775 is a deficient number, since it is larger than the sum of its proper divisors (289475017).

1206145775 is an equidigital number, since it uses as much as digits as its factorization.

1206145775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48245841 (or 48245836 counting only the distinct ones).

The product of its (nonzero) digits is 58800, while the sum is 38.

The square root of 1206145775 is about 34729.6094852793. The cubic root of 1206145775 is about 1064.4696088661.

The spelling of 1206145775 in words is "one billion, two hundred six million, one hundred forty-five thousand, seven hundred seventy-five".