7530687121 has 4 divisors (see below), whose sum is σ = 7773612544. Its totient is φ = 7287761700.

The previous prime is 7530687113. The next prime is 7530687127. The reversal of 7530687121 is 1217860357.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 7530687121 - 2³ = 7530687113 is a prime.

It is a super-2 number, since 2×7530687121² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7530687127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121462665 + ... + 121462726.

It is an arithmetic number, because the mean of its divisors is an integer number (1943403136).

Almost surely, 2^7530687121 is an apocalyptic number.

It is an amenable number.

7530687121 is a deficient number, since it is larger than the sum of its proper divisors (242925423).

7530687121 is a wasteful number, since it uses less digits than its factorization.

7530687121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242925422.

The product of its (nonzero) digits is 70560, while the sum is 40.

The square root of 7530687121 is about 86779.5316938274. The cubic root of 7530687121 is about 1960.0998769908.

The spelling of 7530687121 in words is "seven billion, five hundred thirty million, six hundred eighty-seven thousand, one hundred twenty-one".