1239315121 has 8 divisors (see below), whose sum is σ = 1367172000. Its totient is φ = 1113990240.

The previous prime is 1239315097. The next prime is 1239315127. The reversal of 1239315121 is 1215139321.

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

It is not a de Polignac number, because 1239315121 - 2⁵ = 1239315089 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1239315121.

It is not an unprimeable number, because it can be changed into a prime (1239315127) by changing a digit.

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, 631971 + ... + 633928.

It is an arithmetic number, because the mean of its divisors is an integer number (170896500).

Almost surely, 2^1239315121 is an apocalyptic number.

1239315121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1239315121 is a deficient number, since it is larger than the sum of its proper divisors (127856879).

1239315121 is a wasteful number, since it uses less digits than its factorization.

1239315121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1265999.

The product of its digits is 1620, while the sum is 28.

The square root of 1239315121 is about 35203.9077518391. The cubic root of 1239315121 is about 1074.1392413102.

The spelling of 1239315121 in words is "one billion, two hundred thirty-nine million, three hundred fifteen thousand, one hundred twenty-one".