421545124 has 144 divisors (see below), whose sum is σ = 1058569344. Its totient is φ = 142433280.

The previous prime is 421545119. The next prime is 421545133.

421545124 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 421545092 and 421545101.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 748467 + ... + 749029.

It is an arithmetic number, because the mean of its divisors is an integer number (7351176).

Almost surely, 2^421545124 is an apocalyptic number.

421545124 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 421545124, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (529284672).

421545124 is an abundant number, since it is smaller than the sum of its proper divisors (637024220).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

421545124 is a wasteful number, since it uses less digits than its factorization.

421545124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 626 (or 613 counting only the distinct ones).

The product of its digits is 6400, while the sum is 28.

The square root of 421545124 is about 20531.5640904438. The cubic root of 421545124 is about 749.8044669528.

It can be divided in two parts, 42154 and 5124, that added together give a triangular number (47278 = T₃₀₇).

The spelling of 421545124 in words is "four hundred twenty-one million, five hundred forty-five thousand, one hundred twenty-four".