420642654 has 8 divisors (see below), whose sum is σ = 841285320. Its totient is φ = 140214216.

The previous prime is 420642647. The next prime is 420642659. The reversal of 420642654 is 456246024.

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

420642654 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420642659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35053549 + ... + 35053560.

It is an arithmetic number, because the mean of its divisors is an integer number (105160665).

Almost surely, 2^420642654 is an apocalyptic number.

420642654 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

420642654 is a wasteful number, since it uses less digits than its factorization.

420642654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70107114.

The product of its (nonzero) digits is 46080, while the sum is 33.

The square root of 420642654 is about 20509.5746908609. The cubic root of 420642654 is about 749.2690086559.

Adding to 420642654 its reverse (456246024), we get a palindrome (876888678).

The spelling of 420642654 in words is "four hundred twenty million, six hundred forty-two thousand, six hundred fifty-four".