7121501 has 8 divisors (see below), whose sum is σ = 7567320. Its totient is φ = 6689088.

The previous prime is 7121489. The next prime is 7121503. The reversal of 7121501 is 1051217.

It can be written as a sum of positive squares in 4 ways, for example, as 624100 + 6497401 = 790^2 + 2549^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 7121501 - 2⁶ = 7121437 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7121501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7121503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2246 + ... + 4391.

It is an arithmetic number, because the mean of its divisors is an integer number (945915).

Almost surely, 2^7121501 is an apocalyptic number.

It is an amenable number.

7121501 is a deficient number, since it is larger than the sum of its proper divisors (445819).

7121501 is a wasteful number, since it uses less digits than its factorization.

7121501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6703.

The product of its (nonzero) digits is 70, while the sum is 17.

The square root of 7121501 is about 2668.6140597696. The cubic root of 7121501 is about 192.3935522121.

Adding to 7121501 its reverse (1051217), we get a palindrome (8172718).

The spelling of 7121501 in words is "seven million, one hundred twenty-one thousand, five hundred one".