7251161 has 4 divisors (see below), whose sum is σ = 7269300. Its totient is φ = 7233024.

The previous prime is 7251157. The next prime is 7251169. The reversal of 7251161 is 1611527.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1611527 = 107 ⋅15061.

It can be written as a sum of positive squares in 2 ways, for example, as 5856400 + 1394761 = 2420^2 + 1181^2 .

It is a cyclic number.

It is not a de Polignac number, because 7251161 - 2² = 7251157 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7251169) 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, 8456 + ... + 9273.

It is an arithmetic number, because the mean of its divisors is an integer number (1817325).

Almost surely, 2^7251161 is an apocalyptic number.

It is an amenable number.

7251161 is a deficient number, since it is larger than the sum of its proper divisors (18139).

7251161 is a wasteful number, since it uses less digits than its factorization.

7251161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18138.

The product of its digits is 420, while the sum is 23.

The square root of 7251161 is about 2692.7979872244. The cubic root of 7251161 is about 193.5541627162.

Adding to 7251161 its reverse (1611527), we get a palindrome (8862688).

The spelling of 7251161 in words is "seven million, two hundred fifty-one thousand, one hundred sixty-one".