7122251 has 4 divisors (see below), whose sum is σ = 7137600. Its totient is φ = 7106904.

The previous prime is 7122209. The next prime is 7122253. The reversal of 7122251 is 1522217.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1522217 = 37 ⋅41141.

It is a cyclic number.

It is not a de Polignac number, because 7122251 - 2⁶ = 7122187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7122253) 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 3 ways as a sum of consecutive naturals, for example, 6956 + ... + 7913.

It is an arithmetic number, because the mean of its divisors is an integer number (1784400).

Almost surely, 2^7122251 is an apocalyptic number.

7122251 is a deficient number, since it is larger than the sum of its proper divisors (15349).

7122251 is a wasteful number, since it uses less digits than its factorization.

7122251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15348.

The product of its digits is 280, while the sum is 20.

The square root of 7122251 is about 2668.7545784504. The cubic root of 7122251 is about 192.4003059428.

Adding to 7122251 its reverse (1522217), we get a palindrome (8644468).

It can be divided in two parts, 71 and 22251, that added together give a palindrome (22322).

The spelling of 7122251 in words is "seven million, one hundred twenty-two thousand, two hundred fifty-one".