1321552047 has 8 divisors (see below), whose sum is σ = 1764138544. Its totient is φ = 880000128.

The previous prime is 1321552031. The next prime is 1321552097. The reversal of 1321552047 is 7402551231.

1321552047 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 1321552047 - 2⁴ = 1321552031 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321552097) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 255658 + ... + 260775.

It is an arithmetic number, because the mean of its divisors is an integer number (220517318).

Almost surely, 2^1321552047 is an apocalyptic number.

1321552047 is a deficient number, since it is larger than the sum of its proper divisors (442586497).

1321552047 is an equidigital number, since it uses as much as digits as its factorization.

1321552047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 517289.

The product of its (nonzero) digits is 8400, while the sum is 30.

The square root of 1321552047 is about 36353.1573181753. The cubic root of 1321552047 is about 1097.3910753022.

The spelling of 1321552047 in words is "one billion, three hundred twenty-one million, five hundred fifty-two thousand, forty-seven".