1321031404 has 48 divisors (see below), whose sum is σ = 3007581696. Its totient is φ = 492307200.

The previous prime is 1321031401. The next prime is 1321031431. The reversal of 1321031404 is 4041301231.

It is a super-2 number, since 2×1321031404² = 3490247940708422432, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1321031401) 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 15 ways as a sum of consecutive naturals, for example, 86157 + ... + 100324.

It is an arithmetic number, because the mean of its divisors is an integer number (62657952).

Almost surely, 2^1321031404 is an apocalyptic number.

1321031404 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1321031404 is an abundant number, since it is smaller than the sum of its proper divisors (1686550292).

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

1321031404 is a wasteful number, since it uses less digits than its factorization.

1321031404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186526 (or 186524 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 1321031404 is about 36345.9957079181. The cubic root of 1321031404 is about 1097.2469457717.

Adding to 1321031404 its reverse (4041301231), we get a palindrome (5362332635).

The spelling of 1321031404 in words is "one billion, three hundred twenty-one million, thirty-one thousand, four hundred four".