1321872047 has 8 divisors (see below), whose sum is σ = 1396863600. Its totient is φ = 1247422464.

The previous prime is 1321872017. The next prime is 1321872091. The reversal of 1321872047 is 7402781231.

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 1321872047 - 2²² = 1317677743 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1321871998 and 1321872016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321872017) 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, 130472 + ... + 140237.

It is an arithmetic number, because the mean of its divisors is an integer number (174607950).

Almost surely, 2^1321872047 is an apocalyptic number.

1321872047 is a deficient number, since it is larger than the sum of its proper divisors (74991553).

1321872047 is a wasteful number, since it uses less digits than its factorization.

1321872047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270985.

The product of its (nonzero) digits is 18816, while the sum is 35.

The square root of 1321872047 is about 36357.5583201073. The cubic root of 1321872047 is about 1097.4796420761.

The spelling of 1321872047 in words is "one billion, three hundred twenty-one million, eight hundred seventy-two thousand, forty-seven".