120521040 has 40 divisors (see below), whose sum is σ = 373615968. Its totient is φ = 32138880.

The previous prime is 120521039. The next prime is 120521069. The reversal of 120521040 is 40125021.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 250846 + ... + 251325.

Almost surely, 2^120521040 is an apocalyptic number.

120521040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

120521040 is an abundant number, since it is smaller than the sum of its proper divisors (253094928).

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

120521040 is a wasteful number, since it uses less digits than its factorization.

120521040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 502187 (or 502181 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 120521040 is about 10978.2075039598. The cubic root of 120521040 is about 493.9552703085.

Adding to 120521040 its reverse (40125021), we get a palindrome (160646061).

The spelling of 120521040 in words is "one hundred twenty million, five hundred twenty-one thousand, forty".