245021121 has 12 divisors (see below), whose sum is σ = 354133780. Its totient is φ = 163248480.

The previous prime is 245021099. The next prime is 245021123. The reversal of 245021121 is 121120542.

245021121 is a `hidden beast` number, since 2 + 450 + 211 + 2 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 13220496 + 231800625 = 3636^2 + 15225^2 .

It is not a de Polignac number, because 245021121 - 2¹⁴ = 245004737 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 245021094 and 245021103.

It is not an unprimeable number, because it can be changed into a prime (245021123) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9435 + ... + 24063.

Almost surely, 2^245021121 is an apocalyptic number.

It is an amenable number.

245021121 is a deficient number, since it is larger than the sum of its proper divisors (109112659).

245021121 is a wasteful number, since it uses less digits than its factorization.

245021121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16496 (or 16493 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 245021121 is about 15653.1505135548. The cubic root of 245021121 is about 625.7504551334.

Adding to 245021121 its reverse (121120542), we get a palindrome (366141663).

The spelling of 245021121 in words is "two hundred forty-five million, twenty-one thousand, one hundred twenty-one".