140521320 has 96 divisors (see below), whose sum is σ = 483579720. Its totient is φ = 35266560.

The previous prime is 140521313. The next prime is 140521331. The reversal of 140521320 is 23125041.

140521320 is a `hidden beast` number, since 140 + 521 + 3 + 2 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 133957476 + 6563844 = 11574^2 + 2562^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 140521293 and 140521302.

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 23 ways as a sum of consecutive naturals, for example, 5361 + ... + 17600.

Almost surely, 2^140521320 is an apocalyptic number.

140521320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

140521320 is an abundant number, since it is smaller than the sum of its proper divisors (343058400).

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

140521320 is a wasteful number, since it uses less digits than its factorization.

140521320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22995 (or 22988 counting only the distinct ones).

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

The square root of 140521320 is about 11854.1688869359. The cubic root of 140521320 is about 519.8931239918.

Adding to 140521320 its reverse (23125041), we get a palindrome (163646361).

The spelling of 140521320 in words is "one hundred forty million, five hundred twenty-one thousand, three hundred twenty".