1005260121 has 12 divisors (see below), whose sum is σ = 1466141248. Its totient is φ = 663666264.

The previous prime is 1005260101. The next prime is 1005260159. The reversal of 1005260121 is 1210625001.

1005260121 is a `hidden beast` number, since 10 + 0 + 52 + 601 + 2 + 1 = 666.

It is not a de Polignac number, because 1005260121 - 2¹¹ = 1005258073 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1005260094 and 1005260103.

It is not an unprimeable number, because it can be changed into a prime (1005260101) 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, 541285 + ... + 543138.

Almost surely, 2^1005260121 is an apocalyptic number.

It is an amenable number.

1005260121 is a deficient number, since it is larger than the sum of its proper divisors (460881127).

1005260121 is a wasteful number, since it uses less digits than its factorization.

1005260121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1084532 (or 1084529 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 1005260121 is about 31705.8373332104. The cubic root of 1005260121 is about 1001.7503083001.

Adding to 1005260121 its reverse (1210625001), we get a palindrome (2215885122).

The spelling of 1005260121 in words is "one billion, five million, two hundred sixty thousand, one hundred twenty-one".