7057121 has 8 divisors (see below), whose sum is σ = 7498920. Its totient is φ = 6628608.

The previous prime is 7057103. The next prime is 7057123. The reversal of 7057121 is 1217507.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 4840000 + 2217121 = 2200^2 + 1489^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7057121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7057123) 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, 2216 + ... + 4361.

It is an arithmetic number, because the mean of its divisors is an integer number (937365).

Almost surely, 2^7057121 is an apocalyptic number.

It is an amenable number.

7057121 is a deficient number, since it is larger than the sum of its proper divisors (441799).

7057121 is a wasteful number, since it uses less digits than its factorization.

7057121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6643.

The product of its (nonzero) digits is 490, while the sum is 23.

The square root of 7057121 is about 2656.5242329028. The cubic root of 7057121 is about 191.8120357371.

The spelling of 7057121 in words is "seven million, fifty-seven thousand, one hundred twenty-one".