1213025320 has 64 divisors (see below), whose sum is σ = 2945859840. Its totient is φ = 446880000.

The previous prime is 1213025291. The next prime is 1213025371. The reversal of 1213025320 is 235203121.

It is a super-2 number, since 2×1213025320² = 2942860853922204800, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 252945 + ... + 257695.

It is an arithmetic number, because the mean of its divisors is an integer number (46029060).

Almost surely, 2^1213025320 is an apocalyptic number.

1213025320 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 1213025320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1472929920).

1213025320 is an abundant number, since it is smaller than the sum of its proper divisors (1732834520).

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

1213025320 is a wasteful number, since it uses less digits than its factorization.

1213025320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5266 (or 5262 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 1213025320 is about 34828.5130317101. The cubic root of 1213025320 is about 1066.4895934362.

Adding to 1213025320 its reverse (235203121), we get a palindrome (1448228441).

The spelling of 1213025320 in words is "one billion, two hundred thirteen million, twenty-five thousand, three hundred twenty".