1230520140 has 96 divisors (see below), whose sum is σ = 3853893120. Its totient is φ = 325944000.

The previous prime is 1230520111. The next prime is 1230520201. The reversal of 1230520140 is 410250321.

1230520140 is a `hidden beast` number, since 1 + 2 + 3 + 0 + 520 + 140 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 73995 + ... + 89085.

It is an arithmetic number, because the mean of its divisors is an integer number (40144720).

Almost surely, 2^1230520140 is an apocalyptic number.

1230520140 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 1230520140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1926946560).

1230520140 is an abundant number, since it is smaller than the sum of its proper divisors (2623372980).

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

1230520140 is a wasteful number, since it uses less digits than its factorization.

1230520140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15260 (or 15252 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 1230520140 is about 35078.7705029695. The cubic root of 1230520140 is about 1071.5922780712.

Adding to 1230520140 its reverse (410250321), we get a palindrome (1640770461).

The spelling of 1230520140 in words is "one billion, two hundred thirty million, five hundred twenty thousand, one hundred forty".