1239421097 has 8 divisors (see below), whose sum is σ = 1243762560. Its totient is φ = 1235087280.

The previous prime is 1239421081. The next prime is 1239421109. The reversal of 1239421097 is 7901249321.

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 1239421097 - 2⁴ = 1239421081 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1239421097.

It is not an unprimeable number, because it can be changed into a prime (1239421037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 718478 + ... + 720200.

It is an arithmetic number, because the mean of its divisors is an integer number (155470320).

Almost surely, 2^1239421097 is an apocalyptic number.

It is an amenable number.

1239421097 is a deficient number, since it is larger than the sum of its proper divisors (4341463).

1239421097 is a wasteful number, since it uses less digits than its factorization.

1239421097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3823.

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 1239421097 is about 35205.4128934742. The cubic root of 1239421097 is about 1074.1698576116.

The spelling of 1239421097 in words is "one billion, two hundred thirty-nine million, four hundred twenty-one thousand, ninety-seven".