1342397921 has 8 divisors (see below), whose sum is σ = 1410843840. Its totient is φ = 1274792112.

The previous prime is 1342397909. The next prime is 1342397981. The reversal of 1342397921 is 1297932431.

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

It is not a de Polignac number, because 1342397921 - 2¹⁸ = 1342135777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1342397981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 206750 + ... + 213143.

It is an arithmetic number, because the mean of its divisors is an integer number (176355480).

Almost surely, 2^1342397921 is an apocalyptic number.

It is an amenable number.

1342397921 is a deficient number, since it is larger than the sum of its proper divisors (68445919).

1342397921 is a wasteful number, since it uses less digits than its factorization.

1342397921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420055.

The product of its digits is 81648, while the sum is 41.

The square root of 1342397921 is about 36638.7489005834. The cubic root of 1342397921 is about 1103.1310027050.

The spelling of 1342397921 in words is "one billion, three hundred forty-two million, three hundred ninety-seven thousand, nine hundred twenty-one".