1321326477 has 12 divisors (see below), whose sum is σ = 1918273500. Its totient is φ = 876411648.

The previous prime is 1321326473. The next prime is 1321326491. The reversal of 1321326477 is 7746231231.

1321326477 is a `hidden beast` number, since 1 + 3 + 2 + 1 + 3 + 2 + 647 + 7 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 671535396 + 649791081 = 25914^2 + 25491^2 .

It is not a de Polignac number, because 1321326477 - 2² = 1321326473 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321326473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 370852 + ... + 374397.

It is an arithmetic number, because the mean of its divisors is an integer number (159856125).

Almost surely, 2^1321326477 is an apocalyptic number.

It is an amenable number.

1321326477 is a deficient number, since it is larger than the sum of its proper divisors (596947023).

1321326477 is a wasteful number, since it uses less digits than its factorization.

1321326477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 745452 (or 745449 counting only the distinct ones).

The product of its digits is 42336, while the sum is 36.

The square root of 1321326477 is about 36350.0547042229. The cubic root of 1321326477 is about 1097.3286354383.

The spelling of 1321326477 in words is "one billion, three hundred twenty-one million, three hundred twenty-six thousand, four hundred seventy-seven".