7121144 has 32 divisors (see below), whose sum is σ = 13854720. Its totient is φ = 3429216.

The previous prime is 7121141. The next prime is 7121161. The reversal of 7121144 is 4411217.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7121141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43607 + ... + 43769.

It is an arithmetic number, because the mean of its divisors is an integer number (432960).

Almost surely, 2^7121144 is an apocalyptic number.

It is an amenable number.

7121144 is a deficient number, since it is larger than the sum of its proper divisors (6733576).

7121144 is a wasteful number, since it uses less digits than its factorization.

7121144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339 (or 335 counting only the distinct ones).

The product of its digits is 224, while the sum is 20.

The square root of 7121144 is about 2668.5471702782. The cubic root of 7121144 is about 192.3903372697.

The spelling of 7121144 in words is "seven million, one hundred twenty-one thousand, one hundred forty-four".