1321153652 has 24 divisors (see below), whose sum is σ = 2845562496. Its totient is φ = 522654048.

The previous prime is 1321153651. The next prime is 1321153663. The reversal of 1321153652 is 2563511231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321153651) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1814408 + ... + 1815135.

It is an arithmetic number, because the mean of its divisors is an integer number (118565104).

Almost surely, 2^1321153652 is an apocalyptic number.

It is an amenable number.

1321153652 is an abundant number, since it is smaller than the sum of its proper divisors (1524408844).

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

1321153652 is a wasteful number, since it uses less digits than its factorization.

1321153652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3629567 (or 3629565 counting only the distinct ones).

The product of its digits is 5400, while the sum is 29.

The square root of 1321153652 is about 36347.6773948488. The cubic root of 1321153652 is about 1097.2807910703.

Adding to 1321153652 its reverse (2563511231), we get a palindrome (3884664883).

The spelling of 1321153652 in words is "one billion, three hundred twenty-one million, one hundred fifty-three thousand, six hundred fifty-two".