408061521 has 24 divisors (see below), whose sum is σ = 676540800. Its totient is φ = 232168896.

The previous prime is 408061483. The next prime is 408061531. The reversal of 408061521 is 125160804.

408061521 is a `hidden beast` number, since 4 + 0 + 80 + 61 + 521 = 666.

It is not a de Polignac number, because 408061521 - 2⁶ = 408061457 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (408061531) by changing a digit.

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, 780 + ... + 28578.

It is an arithmetic number, because the mean of its divisors is an integer number (28189200).

Almost surely, 2^408061521 is an apocalyptic number.

It is an amenable number.

408061521 is a deficient number, since it is larger than the sum of its proper divisors (268479279).

408061521 is a wasteful number, since it uses less digits than its factorization.

408061521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28045 (or 28042 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 408061521 is about 20200.5326909960. The cubic root of 408061521 is about 741.7232307881.

The spelling of 408061521 in words is "four hundred eight million, sixty-one thousand, five hundred twenty-one".