7251397 has 2 divisors, whose sum is σ = 7251398. Its totient is φ = 7251396.

The previous prime is 7251389. The next prime is 7251481. The reversal of 7251397 is 7931527.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6687396 + 564001 = 2586^2 + 751^2 .

It is a cyclic number.

It is not a de Polignac number, because 7251397 - 2³ = 7251389 is a prime.

7251397 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7251317) 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, 3625698 + 3625699.

It is an arithmetic number, because the mean of its divisors is an integer number (3625699).

Almost surely, 2^7251397 is an apocalyptic number.

It is an amenable number.

7251397 is a deficient number, since it is larger than the sum of its proper divisors (1).

7251397 is an equidigital number, since it uses as much as digits as its factorization.

7251397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13230, while the sum is 34.

The square root of 7251397 is about 2692.8418074592. The cubic root of 7251397 is about 193.5562625311.

Adding to 7251397 its product of digits (13230), we get a palindrome (7264627).

The spelling of 7251397 in words is "seven million, two hundred fifty-one thousand, three hundred ninety-seven".