356121 has 6 divisors (see below), whose sum is σ = 514410. Its totient is φ = 237408.

The previous prime is 356113. The next prime is 356123. The reversal of 356121 is 121653.

It can be written as a sum of positive squares in only one way, i.e., 318096 + 38025 = 564^2 + 195^2 .

It is not a de Polignac number, because 356121 - 2³ = 356113 is a prime.

356121 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 356094 and 356103.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 356121.

It is not an unprimeable number, because it can be changed into a prime (356123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19776 + ... + 19793.

It is an arithmetic number, because the mean of its divisors is an integer number (85735).

2³⁵⁶¹²¹ is an apocalyptic number.

It is an amenable number.

356121 is a deficient number, since it is larger than the sum of its proper divisors (158289).

356121 is a wasteful number, since it uses less digits than its factorization.

356121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39575 (or 39572 counting only the distinct ones).

The product of its digits is 180, while the sum is 18.

The square root of 356121 is about 596.7587452229. The cubic root of 356121 is about 70.8814393709.

Adding to 356121 its reverse (121653), we get a palindrome (477774).

The spelling of 356121 in words is "three hundred fifty-six thousand, one hundred twenty-one".