1321530147 has 60 divisors (see below), whose sum is σ = 2358774000. Its totient is φ = 734668704.

The previous prime is 1321530131. The next prime is 1321530149. The reversal of 1321530147 is 7410351231.

It is not a de Polignac number, because 1321530147 - 2⁴ = 1321530131 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 1321530147.

It is not an unprimeable number, because it can be changed into a prime (1321530149) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 142354 + ... + 151352.

It is an arithmetic number, because the mean of its divisors is an integer number (39312900).

Almost surely, 2^1321530147 is an apocalyptic number.

1321530147 is a deficient number, since it is larger than the sum of its proper divisors (1037243853).

1321530147 is an equidigital number, since it uses as much as digits as its factorization.

1321530147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9062 (or 9046 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 1321530147 is about 36352.8561051260. The cubic root of 1321530147 is about 1097.3850134909.

Adding to 1321530147 its reverse (7410351231), we get a palindrome (8731881378).

The spelling of 1321530147 in words is "one billion, three hundred twenty-one million, five hundred thirty thousand, one hundred forty-seven".