1246605361 has 4 divisors (see below), whose sum is σ = 1246750324. Its totient is φ = 1246460400.

The previous prime is 1246605343. The next prime is 1246605379. The reversal of 1246605361 is 1635066421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1635066421 = 4139 ⋅395039.

It is an interprime number because it is at equal distance from previous prime (1246605343) and next prime (1246605379).

It can be written as a sum of positive squares in 2 ways, for example, as 274101136 + 972504225 = 16556^2 + 31185^2 .

It is a cyclic number.

It is not a de Polignac number, because 1246605361 - 2⁵ = 1246605329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1246605341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58710 + ... + 77071.

It is an arithmetic number, because the mean of its divisors is an integer number (311687581).

Almost surely, 2^1246605361 is an apocalyptic number.

It is an amenable number.

1246605361 is a deficient number, since it is larger than the sum of its proper divisors (144963).

1246605361 is an equidigital number, since it uses as much as digits as its factorization.

1246605361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144962.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 1246605361 is about 35307.2989762740. The cubic root of 1246605361 is about 1076.2413238819.

The spelling of 1246605361 in words is "one billion, two hundred forty-six million, six hundred five thousand, three hundred sixty-one".