1325240220 has 144 divisors (see below), whose sum is σ = 3973318272. Its totient is φ = 329831040.

The previous prime is 1325240207. The next prime is 1325240221. The reversal of 1325240220 is 220425231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1325240221) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1364335 + ... + 1365305.

It is an arithmetic number, because the mean of its divisors is an integer number (27592488).

Almost surely, 2^1325240220 is an apocalyptic number.

1325240220 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 1325240220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1986659136).

1325240220 is an abundant number, since it is smaller than the sum of its proper divisors (2648078052).

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

1325240220 is a wasteful number, since it uses less digits than its factorization.

1325240220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1072 (or 1047 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 1325240220 is about 36403.8489723271. The cubic root of 1325240220 is about 1098.4109894386.

Adding to 1325240220 its reverse (220425231), we get a palindrome (1545665451).

The spelling of 1325240220 in words is "one billion, three hundred twenty-five million, two hundred forty thousand, two hundred twenty".