421425155 has 16 divisors (see below), whose sum is σ = 547915104. Its totient is φ = 309926400.

The previous prime is 421425143. The next prime is 421425157. The reversal of 421425155 is 551524124.

It is not a de Polignac number, because 421425155 - 2⁴ = 421425139 is a prime.

It is a super-2 number, since 2×421425155² = 355198322533548050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421425157) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53996 + ... + 61305.

It is an arithmetic number, because the mean of its divisors is an integer number (34244694).

Almost surely, 2^421425155 is an apocalyptic number.

421425155 is a deficient number, since it is larger than the sum of its proper divisors (126489949).

421425155 is a wasteful number, since it uses less digits than its factorization.

421425155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115366.

The product of its digits is 8000, while the sum is 29.

The square root of 421425155 is about 20528.6423077611. The cubic root of 421425155 is about 749.7333303795.

Adding to 421425155 its reverse (551524124), we get a palindrome (972949279).

The spelling of 421425155 in words is "four hundred twenty-one million, four hundred twenty-five thousand, one hundred fifty-five".