421510125390 has 64 divisors (see below), whose sum is σ = 1047658613760. Its totient is φ = 108407411840.

The previous prime is 421510125383. The next prime is 421510125431. The reversal of 421510125390 is 93521015124.

It is a happy number.

421510125390 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 526657 + ... + 1058483.

It is an arithmetic number, because the mean of its divisors is an integer number (16369665840).

Almost surely, 2^421510125390 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 421510125390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (523829306880).

421510125390 is an abundant number, since it is smaller than the sum of its proper divisors (626148488370).

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

421510125390 is a wasteful number, since it uses less digits than its factorization.

421510125390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 532777.

The product of its (nonzero) digits is 10800, while the sum is 33.

The spelling of 421510125390 in words is "four hundred twenty-one billion, five hundred ten million, one hundred twenty-five thousand, three hundred ninety".