7146521 has 2 divisors, whose sum is σ = 7146522. Its totient is φ = 7146520.

The previous prime is 7146497. The next prime is 7146533. The reversal of 7146521 is 1256417.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6948496 + 198025 = 2636^2 + 445^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7146521 is a prime.

It is not a weakly prime, because it can be changed into another prime (7146571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3573260 + 3573261.

It is an arithmetic number, because the mean of its divisors is an integer number (3573261).

Almost surely, 2^7146521 is an apocalyptic number.

It is an amenable number.

7146521 is a deficient number, since it is larger than the sum of its proper divisors (1).

7146521 is an equidigital number, since it uses as much as digits as its factorization.

7146521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1680, while the sum is 26.

The square root of 7146521 is about 2673.2977761559. The cubic root of 7146521 is about 192.6186012263.

It can be divided in two parts, 7146 and 521, that added together give a palindrome (7667).

The spelling of 7146521 in words is "seven million, one hundred forty-six thousand, five hundred twenty-one".