1254021320 has 64 divisors (see below), whose sum is σ = 2997751680. Its totient is φ = 470486016.

The previous prime is 1254021313. The next prime is 1254021361. The reversal of 1254021320 is 231204521.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1254021292 and 1254021301.

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, 205757 + ... + 211763.

It is an arithmetic number, because the mean of its divisors is an integer number (46839870).

Almost surely, 2^1254021320 is an apocalyptic number.

1254021320 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 1254021320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1498875840).

1254021320 is an abundant number, since it is smaller than the sum of its proper divisors (1743730360).

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

1254021320 is a wasteful number, since it uses less digits than its factorization.

1254021320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6342 (or 6338 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 1254021320 is about 35412.1634470418. The cubic root of 1254021320 is about 1078.3712646655.

Adding to 1254021320 its reverse (231204521), we get a palindrome (1485225841).

The spelling of 1254021320 in words is "one billion, two hundred fifty-four million, twenty-one thousand, three hundred twenty".