421542870 has 32 divisors (see below), whose sum is σ = 1156232448. Its totient is φ = 96352608.

The previous prime is 421542857. The next prime is 421542881. The reversal of 421542870 is 78245124.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1003464 + ... + 1003883.

It is an arithmetic number, because the mean of its divisors is an integer number (36132264).

Almost surely, 2^421542870 is an apocalyptic number.

421542870 is an abundant number, since it is smaller than the sum of its proper divisors (734689578).

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

421542870 is a wasteful number, since it uses less digits than its factorization.

421542870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2007364.

The product of its (nonzero) digits is 17920, while the sum is 33.

The square root of 421542870 is about 20531.5091992771. The cubic root of 421542870 is about 749.8031305500.

Adding to 421542870 its reverse (78245124), we get a palindrome (499787994).

The spelling of 421542870 in words is "four hundred twenty-one million, five hundred forty-two thousand, eight hundred seventy".