1321152460 has 48 divisors (see below), whose sum is σ = 2936908800. Its totient is φ = 497824704.

The previous prime is 1321152439. The next prime is 1321152487. The reversal of 1321152460 is 642511231.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58309 + ... + 77731.

It is an arithmetic number, because the mean of its divisors is an integer number (61185600).

Almost surely, 2^1321152460 is an apocalyptic number.

1321152460 is a gapful number since it is divisible by the number (10) 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 1321152460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1468454400).

1321152460 is an abundant number, since it is smaller than the sum of its proper divisors (1615756340).

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

1321152460 is a wasteful number, since it uses less digits than its factorization.

1321152460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19630 (or 19628 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 1321152460 is about 36347.6609976488. The cubic root of 1321152460 is about 1097.2804610661.

Adding to 1321152460 its reverse (642511231), we get a palindrome (1963663691).

The spelling of 1321152460 in words is "one billion, three hundred twenty-one million, one hundred fifty-two thousand, four hundred sixty".