1321171423 has 16 divisors (see below), whose sum is σ = 1602220032. Its totient is φ = 1072908000.

The previous prime is 1321171409. The next prime is 1321171427. The reversal of 1321171423 is 3241711231.

It is a cyclic number.

It is not a de Polignac number, because 1321171423 - 2⁵ = 1321171391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321171427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 144583 + ... + 153448.

It is an arithmetic number, because the mean of its divisors is an integer number (100138752).

Almost surely, 2^1321171423 is an apocalyptic number.

1321171423 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1321171423 is a deficient number, since it is larger than the sum of its proper divisors (281048609).

1321171423 is a wasteful number, since it uses less digits than its factorization.

1321171423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298086.

The product of its digits is 1008, while the sum is 25.

The square root of 1321171423 is about 36347.9218525626. The cubic root of 1321171423 is about 1097.2857109345.

Adding to 1321171423 its reverse (3241711231), we get a palindrome (4562882654).

The spelling of 1321171423 in words is "one billion, three hundred twenty-one million, one hundred seventy-one thousand, four hundred twenty-three".