1321572280 has 32 divisors (see below), whose sum is σ = 3398329440. Its totient is φ = 453110400.

The previous prime is 1321572271. The next prime is 1321572293. The reversal of 1321572280 is 822751231.

It is a super-3 number, since 3×1321572280³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2359671 + ... + 2360230.

It is an arithmetic number, because the mean of its divisors is an integer number (106197795).

Almost surely, 2^1321572280 is an apocalyptic number.

1321572280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1321572280 is an abundant number, since it is smaller than the sum of its proper divisors (2076757160).

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

1321572280 is a wasteful number, since it uses less digits than its factorization.

1321572280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4719919 (or 4719915 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 1321572280 is about 36353.4356010543. The cubic root of 1321572280 is about 1097.3966756366.

The spelling of 1321572280 in words is "one billion, three hundred twenty-one million, five hundred seventy-two thousand, two hundred eighty".