421429500 has 384 divisors, whose sum is σ = 1509580800. Its totient is φ = 101088000.

The previous prime is 421429499. The next prime is 421429501. The reversal of 421429500 is 5924124.

It is an interprime number because it is at equal distance from previous prime (421429499) and next prime (421429501).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421429501) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 7951474 + ... + 7951526.

It is an arithmetic number, because the mean of its divisors is an integer number (3931200).

Almost surely, 2^421429500 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 421429500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (754790400).

421429500 is an abundant number, since it is smaller than the sum of its proper divisors (1088151300).

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

421429500 is a wasteful number, since it uses less digits than its factorization.

421429500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131 (or 113 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 421429500 is about 20528.7481352371. The cubic root of 421429500 is about 749.7359070174.

The spelling of 421429500 in words is "four hundred twenty-one million, four hundred twenty-nine thousand, five hundred".