120521577240 has 128 divisors (see below), whose sum is σ = 404805772800. Its totient is φ = 31893713280.

The previous prime is 120521577227. The next prime is 120521577251. The reversal of 120521577240 is 42775125021.

120521577240 is a `hidden beast` number, since 1 + 20 + 5 + 21 + 577 + 2 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 120521577195 and 120521577204.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 284452 + ... + 567411.

It is an arithmetic number, because the mean of its divisors is an integer number (3162545100).

Almost surely, 2^120521577240 is an apocalyptic number.

120521577240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

120521577240 is an abundant number, since it is smaller than the sum of its proper divisors (284284195560).

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

120521577240 is a wasteful number, since it uses less digits than its factorization.

120521577240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 852014 (or 852004 counting only the distinct ones).

The product of its (nonzero) digits is 39200, while the sum is 36.

The spelling of 120521577240 in words is "one hundred twenty billion, five hundred twenty-one million, five hundred seventy-seven thousand, two hundred forty".