420357561 has 8 divisors (see below), whose sum is σ = 603590400. Its totient is φ = 258681552.

The previous prime is 420357493. The next prime is 420357563. The reversal of 420357561 is 165753024.

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

It is not a de Polignac number, because 420357561 - 2¹¹ = 420355513 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (420357563) 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, 5389161 + ... + 5389238.

It is an arithmetic number, because the mean of its divisors is an integer number (75448800).

Almost surely, 2^420357561 is an apocalyptic number.

It is an amenable number.

420357561 is a deficient number, since it is larger than the sum of its proper divisors (183232839).

420357561 is a wasteful number, since it uses less digits than its factorization.

420357561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10778415.

The product of its (nonzero) digits is 25200, while the sum is 33.

The square root of 420357561 is about 20502.6232711817. The cubic root of 420357561 is about 749.0996965930.

The spelling of 420357561 in words is "four hundred twenty million, three hundred fifty-seven thousand, five hundred sixty-one".