1338121545 has 8 divisors (see below), whose sum is σ = 2140994496. Its totient is φ = 713664816.

The previous prime is 1338121501. The next prime is 1338121583. The reversal of 1338121545 is 5451218331.

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

It is not a de Polignac number, because 1338121545 - 2⁹ = 1338121033 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44604037 + ... + 44604066.

It is an arithmetic number, because the mean of its divisors is an integer number (267624312).

Almost surely, 2^1338121545 is an apocalyptic number.

1338121545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1338121545 is a deficient number, since it is larger than the sum of its proper divisors (802872951).

1338121545 is an equidigital number, since it uses as much as digits as its factorization.

1338121545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89208111.

The product of its digits is 14400, while the sum is 33.

The square root of 1338121545 is about 36580.3436971278. The cubic root of 1338121545 is about 1101.9583695021.

Adding to 1338121545 its reverse (5451218331), we get a palindrome (6789339876).

The spelling of 1338121545 in words is "one billion, three hundred thirty-eight million, one hundred twenty-one thousand, five hundred forty-five".