7549121 has 2 divisors, whose sum is σ = 7549122. Its totient is φ = 7549120.

The previous prime is 7549097. The next prime is 7549127. The reversal of 7549121 is 1219457.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6948496 + 600625 = 2636^2 + 775^2 .

It is an emirp because it is prime and its reverse (1219457) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7549121 is a prime.

It is not a weakly prime, because it can be changed into another prime (7549127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3774560 + 3774561.

It is an arithmetic number, because the mean of its divisors is an integer number (3774561).

Almost surely, 2^7549121 is an apocalyptic number.

It is an amenable number.

7549121 is a deficient number, since it is larger than the sum of its proper divisors (1).

7549121 is an equidigital number, since it uses as much as digits as its factorization.

7549121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2520, while the sum is 29.

The square root of 7549121 is about 2747.5663777241. The cubic root of 7549121 is about 196.1697907444.

The spelling of 7549121 in words is "seven million, five hundred forty-nine thousand, one hundred twenty-one".