7151281 has 2 divisors, whose sum is σ = 7151282. Its totient is φ = 7151280.

The previous prime is 7151279. The next prime is 7151327. The reversal of 7151281 is 1821517.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6974881 + 176400 = 2641^2 + 420^2 .

It is a cyclic number.

It is not a de Polignac number, because 7151281 - 2¹ = 7151279 is a prime.

It is a super-2 number, since 2×7151281² = 102281639881922, which contains 22 as substring.

Together with 7151279, it forms a pair of twin primes.

It is equal to p₄₈₆₂₅₀ and since 7151281 and 486250 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (7151981) 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, 3575640 + 3575641.

It is an arithmetic number, because the mean of its divisors is an integer number (3575641).

Almost surely, 2^7151281 is an apocalyptic number.

It is an amenable number.

7151281 is a deficient number, since it is larger than the sum of its proper divisors (1).

7151281 is an equidigital number, since it uses as much as digits as its factorization.

7151281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 560, while the sum is 25.

The square root of 7151281 is about 2674.1879141152. The cubic root of 7151281 is about 192.6613568111.

Adding to 7151281 its reverse (1821517), we get a palindrome (8972798).

It can be divided in two parts, 71 and 51281, that multiplied together give a triangular number (3640951 = T₂₆₉₈).

The spelling of 7151281 in words is "seven million, one hundred fifty-one thousand, two hundred eighty-one".