1331424405 has 16 divisors (see below), whose sum is σ = 2366976960. Its totient is φ = 710092944.

The previous prime is 1331424361. The next prime is 1331424407. The reversal of 1331424405 is 5044241331.

It is a happy number.

It is not a de Polignac number, because 1331424405 - 2¹⁶ = 1331358869 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331424407) 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, 4931067 + ... + 4931336.

It is an arithmetic number, because the mean of its divisors is an integer number (147936060).

Almost surely, 2^1331424405 is an apocalyptic number.

1331424405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1331424405 is a deficient number, since it is larger than the sum of its proper divisors (1035552555).

1331424405 is an equidigital number, since it uses as much as digits as its factorization.

1331424405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9862417 (or 9862411 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 1331424405 is about 36488.6887267822. The cubic root of 1331424405 is about 1100.1169035535.

Adding to 1331424405 its reverse (5044241331), we get a palindrome (6375665736).

The spelling of 1331424405 in words is "one billion, three hundred thirty-one million, four hundred twenty-four thousand, four hundred five".