1321475004 has 72 divisors (see below), whose sum is σ = 3565860480. Its totient is φ = 411415200.

The previous prime is 1321475003. The next prime is 1321475039. The reversal of 1321475004 is 4005741231.

1321475004 is a `hidden beast` number, since 13 + 2 + 147 + 500 + 4 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321475003) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34959 + ... + 62169.

It is an arithmetic number, because the mean of its divisors is an integer number (49525840).

Almost surely, 2^1321475004 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1321475004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1782930240).

1321475004 is an abundant number, since it is smaller than the sum of its proper divisors (2244385476).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1321475004 is a wasteful number, since it uses less digits than its factorization.

1321475004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27311 (or 27306 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 1321475004 is about 36352.0976561188. The cubic root of 1321475004 is about 1097.3697498857.

The spelling of 1321475004 in words is "one billion, three hundred twenty-one million, four hundred seventy-five thousand, four".