420154201 has 32 divisors (see below), whose sum is σ = 482077440. Its totient is φ = 363792384.

The previous prime is 420154199. The next prime is 420154261. The reversal of 420154201 is 102451024.

420154201 = 1863² + 1864² + ... + 1976².

It is not a de Polignac number, because 420154201 - 2¹ = 420154199 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420154261) 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 31 ways as a sum of consecutive naturals, for example, 2428551 + ... + 2428723.

It is an arithmetic number, because the mean of its divisors is an integer number (15064920).

Almost surely, 2^420154201 is an apocalyptic number.

It is an amenable number.

420154201 is a deficient number, since it is larger than the sum of its proper divisors (61923239).

420154201 is a wasteful number, since it uses less digits than its factorization.

420154201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 420154201 is about 20497.6633058503. The cubic root of 420154201 is about 748.9788776357.

The spelling of 420154201 in words is "four hundred twenty million, one hundred fifty-four thousand, two hundred one".