420243154 has 8 divisors (see below), whose sum is σ = 630926460. Its totient is φ = 209934336.

The previous prime is 420243149. The next prime is 420243157. The reversal of 420243154 is 451342024.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 335878929 + 84364225 = 18327^2 + 9185^2 .

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

It is not an unprimeable number, because it can be changed into a prime (420243157) 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 3 ways as a sum of consecutive naturals, for example, 90799 + ... + 95314.

Almost surely, 2^420243154 is an apocalyptic number.

420243154 is a deficient number, since it is larger than the sum of its proper divisors (210683306).

420243154 is a wasteful number, since it uses less digits than its factorization.

420243154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187244.

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 420243154 is about 20499.8330237102. The cubic root of 420243154 is about 749.0317306253.

Adding to 420243154 its reverse (451342024), we get a palindrome (871585178).

The spelling of 420243154 in words is "four hundred twenty million, two hundred forty-three thousand, one hundred fifty-four".