420905853 has 12 divisors (see below), whose sum is σ = 611849628. Its totient is φ = 278815680.

The previous prime is 420905783. The next prime is 420905861. The reversal of 420905853 is 358509024.

It can be written as a sum of positive squares in 2 ways, for example, as 80946009 + 339959844 = 8997^2 + 18438^2 .

It is not a de Polignac number, because 420905853 - 2¹² = 420901757 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420905053) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 147528 + ... + 150353.

It is an arithmetic number, because the mean of its divisors is an integer number (50987469).

Almost surely, 2^420905853 is an apocalyptic number.

It is an amenable number.

420905853 is a deficient number, since it is larger than the sum of its proper divisors (190943775).

420905853 is a wasteful number, since it uses less digits than its factorization.

420905853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298044 (or 298041 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The square root of 420905853 is about 20515.9901783950. The cubic root of 420905853 is about 749.4252503296.

The spelling of 420905853 in words is "four hundred twenty million, nine hundred five thousand, eight hundred fifty-three".