905535121 has 4 divisors (see below), whose sum is σ = 936760500. Its totient is φ = 874309744.

The previous prime is 905535101. The next prime is 905535149. The reversal of 905535121 is 121535509.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 759608721 + 145926400 = 27561^2 + 12080^2 .

It is a cyclic number.

It is not a de Polignac number, because 905535121 - 2¹⁹ = 905010833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (905535101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15612646 + ... + 15612703.

It is an arithmetic number, because the mean of its divisors is an integer number (234190125).

Almost surely, 2^905535121 is an apocalyptic number.

It is an amenable number.

905535121 is a deficient number, since it is larger than the sum of its proper divisors (31225379).

905535121 is a wasteful number, since it uses less digits than its factorization.

905535121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31225378.

The product of its (nonzero) digits is 6750, while the sum is 31.

The square root of 905535121 is about 30092.1106105903. The cubic root of 905535121 is about 967.4646372731.

The spelling of 905535121 in words is "nine hundred five million, five hundred thirty-five thousand, one hundred twenty-one".