402455521 has 8 divisors (see below), whose sum is σ = 434145600. Its totient is φ = 370870032.

The previous prime is 402455479. The next prime is 402455531. The reversal of 402455521 is 125554204.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 402455521 - 2¹¹ = 402453473 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 402455521.

It is not an unprimeable number, because it can be changed into a prime (402455531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18055 + ... + 33628.

It is an arithmetic number, because the mean of its divisors is an integer number (54268200).

Almost surely, 2^402455521 is an apocalyptic number.

It is an amenable number.

402455521 is a deficient number, since it is larger than the sum of its proper divisors (31690079).

402455521 is a wasteful number, since it uses less digits than its factorization.

402455521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52295.

The product of its (nonzero) digits is 8000, while the sum is 28.

The square root of 402455521 is about 20061.2941008301. The cubic root of 402455521 is about 738.3109278287.

The spelling of 402455521 in words is "four hundred two million, four hundred fifty-five thousand, five hundred twenty-one".