7251481 has 2 divisors, whose sum is σ = 7251482. Its totient is φ = 7251480.

The previous prime is 7251397. The next prime is 7251487. The reversal of 7251481 is 1841527.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7241481 + 10000 = 2691^2 + 100^2 .

It is a cyclic number.

It is not a de Polignac number, because 7251481 - 2¹³ = 7243289 is a prime.

It is a super-2 number, since 2×7251481² = 105167953386722, which contains 22 as substring.

7251481 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (7251487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3625740 + 3625741.

It is an arithmetic number, because the mean of its divisors is an integer number (3625741).

Almost surely, 2^7251481 is an apocalyptic number.

It is an amenable number.

7251481 is a deficient number, since it is larger than the sum of its proper divisors (1).

7251481 is an equidigital number, since it uses as much as digits as its factorization.

7251481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2240, while the sum is 28.

The square root of 7251481 is about 2692.8574043198. The cubic root of 7251481 is about 193.5570099118.

The spelling of 7251481 in words is "seven million, two hundred fifty-one thousand, four hundred eighty-one".