7121151 has 12 divisors (see below), whose sum is σ = 10411128. Its totient is φ = 4689744.

The previous prime is 7121141. The next prime is 7121161. The reversal of 7121151 is 1511217.

7121151 = 119² + 120² + ... + 284².

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (7121141) and next prime (7121161).

It is not a de Polignac number, because 7121151 - 2¹¹ = 7119103 is a prime.

7121151 is a lucky number.

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 11 ways as a sum of consecutive naturals, for example, 4020 + ... + 5513.

It is an arithmetic number, because the mean of its divisors is an integer number (867594).

Almost surely, 2^7121151 is an apocalyptic number.

7121151 is a deficient number, since it is larger than the sum of its proper divisors (3289977).

7121151 is a wasteful number, since it uses less digits than its factorization.

7121151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9622 (or 9619 counting only the distinct ones).

The product of its digits is 70, while the sum is 18.

The square root of 7121151 is about 2668.5484818530. The cubic root of 7121151 is about 192.3904003088.

Adding to 7121151 its reverse (1511217), we get a palindrome (8632368).

The spelling of 7121151 in words is "seven million, one hundred twenty-one thousand, one hundred fifty-one".