7257851 has 2 divisors, whose sum is σ = 7257852. Its totient is φ = 7257850.

The previous prime is 7257847. The next prime is 7257853. The reversal of 7257851 is 1587527.

It is a strong prime.

It is an emirp because it is prime and its reverse (1587527) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7257851 - 2² = 7257847 is a prime.

It is a super-2 number, since 2×7257851² = 105352802276402, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 7257853, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p₄₉₂₉₈₃ and since 7257851 and 492983 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 (7257853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3628925 + 3628926.

It is an arithmetic number, because the mean of its divisors is an integer number (3628926).

Almost surely, 2^7257851 is an apocalyptic number.

7257851 is a deficient number, since it is larger than the sum of its proper divisors (1).

7257851 is an equidigital number, since it uses as much as digits as its factorization.

7257851 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19600, while the sum is 35.

The square root of 7257851 is about 2694.0399031937. The cubic root of 7257851 is about 193.6136694780.

The spelling of 7257851 in words is "seven million, two hundred fifty-seven thousand, eight hundred fifty-one".