1365221632 has 72 divisors (see below), whose sum is σ = 2832984000. Its totient is φ = 655828992.

The previous prime is 1365221629. The next prime is 1365221633. The reversal of 1365221632 is 2361225631.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1365221594 and 1365221603.

It is not an unprimeable number, because it can be changed into a prime (1365221633) 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, 2278869 + ... + 2279467.

It is an arithmetic number, because the mean of its divisors is an integer number (39347000).

Almost surely, 2^1365221632 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1365221632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1416492000).

1365221632 is an abundant number, since it is smaller than the sum of its proper divisors (1467762368).

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

1365221632 is an equidigital number, since it uses as much as digits as its factorization.

1365221632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 951 (or 937 counting only the distinct ones).

The product of its digits is 12960, while the sum is 31.

The square root of 1365221632 is about 36948.9056942151. The cubic root of 1365221632 is about 1109.3477844723.

The spelling of 1365221632 in words is "one billion, three hundred sixty-five million, two hundred twenty-one thousand, six hundred thirty-two".