7281251 has 2 divisors, whose sum is σ = 7281252. Its totient is φ = 7281250.

The previous prime is 7281247. The next prime is 7281257. The reversal of 7281251 is 1521827.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7281251 - 2² = 7281247 is a prime.

It is a super-2 number, since 2×7281251² = 106033232250002, which contains 22 as substring.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 7281251.

It is not a weakly prime, because it can be changed into another prime (7281257) 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, 3640625 + 3640626.

It is an arithmetic number, because the mean of its divisors is an integer number (3640626).

Almost surely, 2^7281251 is an apocalyptic number.

7281251 is a deficient number, since it is larger than the sum of its proper divisors (1).

7281251 is an equidigital number, since it uses as much as digits as its factorization.

7281251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1120, while the sum is 26.

The square root of 7281251 is about 2698.3793284118. The cubic root of 7281251 is about 193.8215225364.

The spelling of 7281251 in words is "seven million, two hundred eighty-one thousand, two hundred fifty-one".