7121136 has 40 divisors (see below), whose sum is σ = 20070144. Its totient is φ = 2157760.

The previous prime is 7121089. The next prime is 7121137. The reversal of 7121136 is 6311217.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7121137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6216 + ... + 7271.

Almost surely, 2^7121136 is an apocalyptic number.

It is an amenable number.

7121136 is an abundant number, since it is smaller than the sum of its proper divisors (12949008).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7121136 is a wasteful number, since it uses less digits than its factorization.

7121136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13509 (or 13503 counting only the distinct ones).

The product of its digits is 252, while the sum is 21.

The square root of 7121136 is about 2668.5456713349. The cubic root of 7121136 is about 192.3902652250.

The spelling of 7121136 in words is "seven million, one hundred twenty-one thousand, one hundred thirty-six".