405642455 has 8 divisors (see below), whose sum is σ = 494036592. Its totient is φ = 319670208.

The previous prime is 405642439. The next prime is 405642469. The reversal of 405642455 is 554246504.

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

It is a cyclic number.

It is not a de Polignac number, because 405642455 - 2⁴ = 405642439 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 605102 + ... + 605771.

It is an arithmetic number, because the mean of its divisors is an integer number (61754574).

Almost surely, 2^405642455 is an apocalyptic number.

405642455 is a deficient number, since it is larger than the sum of its proper divisors (88394137).

405642455 is a wasteful number, since it uses less digits than its factorization.

405642455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1210945.

The product of its (nonzero) digits is 96000, while the sum is 35.

The square root of 405642455 is about 20140.5673951853. The cubic root of 405642455 is about 740.2546329701.

Adding to 405642455 its reverse (554246504), we get a palindrome (959888959).

The spelling of 405642455 in words is "four hundred five million, six hundred forty-two thousand, four hundred fifty-five".