355121420 has 12 divisors (see below), whose sum is σ = 745755024. Its totient is φ = 142048560.

The previous prime is 355121407. The next prime is 355121441. The reversal of 355121420 is 24121553.

It is a super-2 number, since 2×355121420² = 252222445885632800, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8878016 + ... + 8878055.

It is an arithmetic number, because the mean of its divisors is an integer number (62146252).

Almost surely, 2^355121420 is an apocalyptic number.

It is an amenable number.

355121420 is an abundant number, since it is smaller than the sum of its proper divisors (390633604).

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

355121420 is a wasteful number, since it uses less digits than its factorization.

355121420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17756080 (or 17756078 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 355121420 is about 18844.6655581891. The cubic root of 355121420 is about 708.1505925210.

Adding to 355121420 its reverse (24121553), we get a palindrome (379242973).

The spelling of 355121420 in words is "three hundred fifty-five million, one hundred twenty-one thousand, four hundred twenty".