7253708121 has 36 divisors (see below), whose sum is σ = 12194159796. Its totient is φ = 4137576960.

The previous prime is 7253708117. The next prime is 7253708131. The reversal of 7253708121 is 1218073527.

It can be written as a sum of positive squares in 2 ways, for example, as 5800954896 + 1452753225 = 76164^2 + 38115^2 .

It is not a de Polignac number, because 7253708121 - 2² = 7253708117 is a prime.

It is a super-2 number, since 2×7253708121² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7253708131) 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 35 ways as a sum of consecutive naturals, for example, 177396 + ... + 214421.

It is an arithmetic number, because the mean of its divisors is an integer number (338726661).

Almost surely, 2^7253708121 is an apocalyptic number.

It is an amenable number.

7253708121 is a deficient number, since it is larger than the sum of its proper divisors (4940451675).

7253708121 is a wasteful number, since it uses less digits than its factorization.

7253708121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391862 (or 391848 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 36.

The square root of 7253708121 is about 85168.7038823534. The cubic root of 7253708121 is about 1935.7682337052.

The spelling of 7253708121 in words is "seven billion, two hundred fifty-three million, seven hundred eight thousand, one hundred twenty-one".