420651641 has 8 divisors (see below), whose sum is σ = 441288000. Its totient is φ = 400424080.

The previous prime is 420651599. The next prime is 420651683. The reversal of 420651641 is 146156024.

It is an interprime number because it is at equal distance from previous prime (420651599) and next prime (420651683).

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 420651641 - 2¹⁰ = 420650617 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (420651541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100091 + ... + 104208.

It is an arithmetic number, because the mean of its divisors is an integer number (55161000).

Almost surely, 2^420651641 is an apocalyptic number.

It is an amenable number.

420651641 is a deficient number, since it is larger than the sum of its proper divisors (20636359).

420651641 is a wasteful number, since it uses less digits than its factorization.

420651641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204399.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 420651641 is about 20509.7937824835. The cubic root of 420651641 is about 749.2743446440.

The spelling of 420651641 in words is "four hundred twenty million, six hundred fifty-one thousand, six hundred forty-one".