1321004472 has 32 divisors (see below), whose sum is σ = 3321611280. Its totient is φ = 437788160.

The previous prime is 1321004467. The next prime is 1321004473. The reversal of 1321004472 is 2744001231.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321004473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 154929 + ... + 163232.

Almost surely, 2^1321004472 is an apocalyptic number.

1321004472 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1321004472 is an abundant number, since it is smaller than the sum of its proper divisors (2000606808).

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

1321004472 is a wasteful number, since it uses less digits than its factorization.

1321004472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318343 (or 318339 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 1321004472 is about 36345.6252112961. The cubic root of 1321004472 is about 1097.2394891598.

The spelling of 1321004472 in words is "one billion, three hundred twenty-one million, four thousand, four hundred seventy-two".