1324157605 has 4 divisors (see below), whose sum is σ = 1588989132. Its totient is φ = 1059326080.

The previous prime is 1324157599. The next prime is 1324157621. The reversal of 1324157605 is 5067514231.

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 632572801 + 691584804 = 25151^2 + 26298^2 .

It is not a de Polignac number, because 1324157605 - 2²⁵ = 1290603173 is a prime.

It is a Duffinian number.

It is a congruent 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, 132415756 + ... + 132415765.

It is an arithmetic number, because the mean of its divisors is an integer number (397247283).

Almost surely, 2^1324157605 is an apocalyptic number.

It is an amenable number.

1324157605 is a deficient number, since it is larger than the sum of its proper divisors (264831527).

1324157605 is an equidigital number, since it uses as much as digits as its factorization.

1324157605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264831526.

The product of its (nonzero) digits is 25200, while the sum is 34.

The square root of 1324157605 is about 36388.9764214384. The cubic root of 1324157605 is about 1098.1118033848. Note that the first 3 decimals are identical.

The spelling of 1324157605 in words is "one billion, three hundred twenty-four million, one hundred fifty-seven thousand, six hundred five".