1355642065 has 4 divisors (see below), whose sum is σ = 1626770484. Its totient is φ = 1084513648.

The previous prime is 1355642053. The next prime is 1355642083. The reversal of 1355642065 is 5602465531.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 252937216 + 1102704849 = 15904^2 + 33207^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1355642065 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 135564202 + ... + 135564211.

It is an arithmetic number, because the mean of its divisors is an integer number (406692621).

Almost surely, 2^1355642065 is an apocalyptic number.

It is an amenable number.

1355642065 is a deficient number, since it is larger than the sum of its proper divisors (271128419).

1355642065 is an equidigital number, since it uses as much as digits as its factorization.

1355642065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271128418.

The product of its (nonzero) digits is 108000, while the sum is 37.

The square root of 1355642065 is about 36819.0448681114. The cubic root of 1355642065 is about 1106.7469796535.

The spelling of 1355642065 in words is "one billion, three hundred fifty-five million, six hundred forty-two thousand, sixty-five".