421156125 has 128 divisors (see below), whose sum is σ = 870105600. Its totient is φ = 199584000.

The previous prime is 421156123. The next prime is 421156157. The reversal of 421156125 is 521651124.

421156125 is a `hidden beast` number, since 42 + 1 + 1 + 5 + 612 + 5 = 666.

It is not a de Polignac number, because 421156125 - 2¹ = 421156123 is a prime.

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 (421156123) 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, 1272210 + ... + 1272540.

It is an arithmetic number, because the mean of its divisors is an integer number (6797700).

Almost surely, 2^421156125 is an apocalyptic number.

421156125 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

421156125 is an abundant number, since it is smaller than the sum of its proper divisors (448949475).

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

421156125 is a wasteful number, since it uses less digits than its factorization.

421156125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397 (or 381 counting only the distinct ones).

The product of its digits is 2400, while the sum is 27.

The square root of 421156125 is about 20522.0887094857. The cubic root of 421156125 is about 749.5737578027.

The spelling of 421156125 in words is "four hundred twenty-one million, one hundred fifty-six thousand, one hundred twenty-five".