1321004471 has 8 divisors (see below), whose sum is σ = 1401038304. Its totient is φ = 1242853920.

The previous prime is 1321004467. The next prime is 1321004473. The reversal of 1321004471 is 1744001231.

It is a happy number.

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 1321004471 - 2² = 1321004467 is a prime.

It is a super-3 number, since 3×1321004471³ (a number of 28 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

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 polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 469376 + ... + 472181.

It is an arithmetic number, because the mean of its divisors is an integer number (175129788).

Almost surely, 2^1321004471 is an apocalyptic number.

1321004471 is a deficient number, since it is larger than the sum of its proper divisors (80033833).

1321004471 is an equidigital number, since it uses as much as digits as its factorization.

1321004471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 941641.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 1321004471 is about 36345.6251975392. The cubic root of 1321004471 is about 1097.2394888829.

The spelling of 1321004471 in words is "one billion, three hundred twenty-one million, four thousand, four hundred seventy-one".