7137121 has 2 divisors, whose sum is σ = 7137122. Its totient is φ = 7137120.

The previous prime is 7137101. The next prime is 7137131. The reversal of 7137121 is 1217317.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5475600 + 1661521 = 2340^2 + 1289^2 .

It is an emirp because it is prime and its reverse (1217317) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7137121 - 2¹⁵ = 7104353 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7137092 and 7137101.

It is not a weakly prime, because it can be changed into another prime (7137101) 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 as a sum of consecutive naturals, namely, 3568560 + 3568561.

It is an arithmetic number, because the mean of its divisors is an integer number (3568561).

Almost surely, 2^7137121 is an apocalyptic number.

It is an amenable number.

7137121 is a deficient number, since it is larger than the sum of its proper divisors (1).

7137121 is an equidigital number, since it uses as much as digits as its factorization.

7137121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 294, while the sum is 22.

The square root of 7137121 is about 2671.5390695253. The cubic root of 7137121 is about 192.5341121310.

The spelling of 7137121 in words is "seven million, one hundred thirty-seven thousand, one hundred twenty-one".