355121000 has 128 divisors (see below), whose sum is σ = 912038400. Its totient is φ = 128620800.

The previous prime is 355120999. The next prime is 355121021. The reversal of 355121000 is 121553.

It is a super-2 number, since 2×355121000² = 252221849282000000, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 355121000.

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, 766769 + ... + 767231.

It is an arithmetic number, because the mean of its divisors is an integer number (7125300).

Almost surely, 2^355121000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 355121000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (456019200).

355121000 is an abundant number, since it is smaller than the sum of its proper divisors (556917400).

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

355121000 is a wasteful number, since it uses less digits than its factorization.

355121000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 556 (or 542 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 17.

The square root of 355121000 is about 18844.6544144487. The cubic root of 355121000 is about 708.1503133457.

Adding to 355121000 its reverse (121553), we get a palindrome (355242553).

The spelling of 355121000 in words is "three hundred fifty-five million, one hundred twenty-one thousand".