1013425121 has 4 divisors (see below), whose sum is σ = 1013551044. Its totient is φ = 1013299200.

The previous prime is 1013425117. The next prime is 1013425151. The reversal of 1013425121 is 1215243101.

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 470022400 + 543402721 = 21680^2 + 23311^2 .

It is a cyclic number.

It is not a de Polignac number, because 1013425121 - 2² = 1013425117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1013425093 and 1013425102.

It is not an unprimeable number, because it can be changed into a prime (1013425151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50000 + ... + 67281.

It is an arithmetic number, because the mean of its divisors is an integer number (253387761).

Almost surely, 2^1013425121 is an apocalyptic number.

It is an amenable number.

1013425121 is a deficient number, since it is larger than the sum of its proper divisors (125923).

1013425121 is an equidigital number, since it uses as much as digits as its factorization.

1013425121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125922.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 1013425121 is about 31834.3387083822. The cubic root of 1013425121 is about 1004.4551623854.

Adding to 1013425121 its reverse (1215243101), we get a palindrome (2228668222).

The spelling of 1013425121 in words is "one billion, thirteen million, four hundred twenty-five thousand, one hundred twenty-one".