7251129009 has 6 divisors (see below), whose sum is σ = 10473853026. Its totient is φ = 4834086000.

The previous prime is 7251129007. The next prime is 7251129023. The reversal of 7251129009 is 9009211527.

It can be written as a sum of positive squares in only one way, i.e., 4961793600 + 2289335409 = 70440^2 + 47847^2 .

It is not a de Polignac number, because 7251129009 - 2¹ = 7251129007 is a prime.

It is a super-2 number, since 2×7251129009² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7251129007) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 402840492 + ... + 402840509.

It is an arithmetic number, because the mean of its divisors is an integer number (1745642171).

Almost surely, 2^7251129009 is an apocalyptic number.

It is an amenable number.

7251129009 is a deficient number, since it is larger than the sum of its proper divisors (3222724017).

7251129009 is a wasteful number, since it uses less digits than its factorization.

7251129009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 805681007 (or 805681004 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 36.

The square root of 7251129009 is about 85153.5613406744. The cubic root of 7251129009 is about 1935.5387807215.

The spelling of 7251129009 in words is "seven billion, two hundred fifty-one million, one hundred twenty-nine thousand, nine".