1321147464 has 128 divisors (see below), whose sum is σ = 4092023040. Its totient is φ = 346125312.

The previous prime is 1321147459. The next prime is 1321147489. The reversal of 1321147464 is 4647411231.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 340962 + ... + 344814.

It is an arithmetic number, because the mean of its divisors is an integer number (31968930).

Almost surely, 2^1321147464 is an apocalyptic number.

1321147464 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1321147464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2046011520).

1321147464 is an abundant number, since it is smaller than the sum of its proper divisors (2770875576).

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

1321147464 is a wasteful number, since it uses less digits than its factorization.

1321147464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4039 (or 4035 counting only the distinct ones).

The product of its digits is 16128, while the sum is 33.

The square root of 1321147464 is about 36347.5922723913. The cubic root of 1321147464 is about 1097.2790779251.

Adding to 1321147464 its reverse (4647411231), we get a palindrome (5968558695).

It can be divided in two parts, 1321 and 147464, that added together give a triangular number (148785 = T₅₄₅).

The spelling of 1321147464 in words is "one billion, three hundred twenty-one million, one hundred forty-seven thousand, four hundred sixty-four".