421220152 has 16 divisors (see below), whose sum is σ = 836246160. Its totient is φ = 198221184.

The previous prime is 421220113. The next prime is 421220161. The reversal of 421220152 is 251022124.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1548468 + ... + 1548739.

It is an arithmetic number, because the mean of its divisors is an integer number (52265385).

Almost surely, 2^421220152 is an apocalyptic number.

It is an amenable number.

421220152 is a deficient number, since it is larger than the sum of its proper divisors (415026008).

421220152 is a wasteful number, since it uses less digits than its factorization.

421220152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3097230 (or 3097226 counting only the distinct ones).

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

The square root of 421220152 is about 20523.6486035013. The cubic root of 421220152 is about 749.6117409672.

Adding to 421220152 its reverse (251022124), we get a palindrome (672242276).

It can be divided in two parts, 4212201 and 52, that added together give a triangular number (4212253 = T₂₉₀₂).

The spelling of 421220152 in words is "four hundred twenty-one million, two hundred twenty thousand, one hundred fifty-two".