1205215361 has 16 divisors (see below), whose sum is σ = 1417651200. Its totient is φ = 1003268688.

The previous prime is 1205215351. The next prime is 1205215373. The reversal of 1205215361 is 1635125021.

It is a cyclic number.

It is not a de Polignac number, because 1205215361 - 2²² = 1201021057 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1205215361.

It is not an unprimeable number, because it can be changed into a prime (1205215301) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16700 + ... + 51858.

It is an arithmetic number, because the mean of its divisors is an integer number (88603200).

Almost surely, 2^1205215361 is an apocalyptic number.

It is an amenable number.

1205215361 is a deficient number, since it is larger than the sum of its proper divisors (212435839).

1205215361 is an equidigital number, since it uses as much as digits as its factorization.

1205215361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35308.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 1205215361 is about 34716.2117893067. The cubic root of 1205215361 is about 1064.1958298535.

The spelling of 1205215361 in words is "one billion, two hundred five million, two hundred fifteen thousand, three hundred sixty-one".