420522154 has 8 divisors (see below), whose sum is σ = 679305060. Its totient is φ = 194087136.

The previous prime is 420522143. The next prime is 420522197. The reversal of 420522154 is 451225024.

It can be written as a sum of positive squares in 2 ways, for example, as 409131529 + 11390625 = 20227^2 + 3375^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8086939 + ... + 8086990.

Almost surely, 2^420522154 is an apocalyptic number.

420522154 is a deficient number, since it is larger than the sum of its proper divisors (258782906).

420522154 is a wasteful number, since it uses less digits than its factorization.

420522154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16173944.

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 420522154 is about 20506.6368281101. The cubic root of 420522154 is about 749.1974550165.

Adding to 420522154 its reverse (451225024), we get a palindrome (871747178).

The spelling of 420522154 in words is "four hundred twenty million, five hundred twenty-two thousand, one hundred fifty-four".