1421317320 has 64 divisors (see below), whose sum is σ = 4274000640. Its totient is φ = 378124800.

The previous prime is 1421317319. The next prime is 1421317321. The reversal of 1421317320 is 237131241.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1421317319) and next prime (1421317321).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (1421317321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37980 + ... + 65460.

It is an arithmetic number, because the mean of its divisors is an integer number (66781260).

Almost surely, 2^1421317320 is an apocalyptic number.

1421317320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1421317320 is an abundant number, since it is smaller than the sum of its proper divisors (2852683320).

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

1421317320 is a wasteful number, since it uses less digits than its factorization.

1421317320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27926 (or 27922 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 1421317320 is about 37700.3623324763. The cubic root of 1421317320 is about 1124.3383289378.

Adding to 1421317320 its reverse (237131241), we get a palindrome (1658448561).

The spelling of 1421317320 in words is "one billion, four hundred twenty-one million, three hundred seventeen thousand, three hundred twenty".