1238541565 has 8 divisors (see below), whose sum is σ = 1508433120. Its totient is φ = 976044432.

The previous prime is 1238541553. The next prime is 1238541583. The reversal of 1238541565 is 5651458321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1238541565 - 2¹⁷ = 1238410493 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1848235 + ... + 1848904.

It is an arithmetic number, because the mean of its divisors is an integer number (188554140).

Almost surely, 2^1238541565 is an apocalyptic number.

It is an amenable number.

1238541565 is a deficient number, since it is larger than the sum of its proper divisors (269891555).

1238541565 is an equidigital number, since it uses as much as digits as its factorization.

1238541565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3697211.

The product of its digits is 144000, while the sum is 40.

The square root of 1238541565 is about 35192.9192452118. The cubic root of 1238541565 is about 1073.9157093020.

Adding to 1238541565 its reverse (5651458321), we get a palindrome (6889999886).

The spelling of 1238541565 in words is "one billion, two hundred thirty-eight million, five hundred forty-one thousand, five hundred sixty-five".