7256531 has 2 divisors, whose sum is σ = 7256532. Its totient is φ = 7256530.

The previous prime is 7256527. The next prime is 7256533. The reversal of 7256531 is 1356527.

7256531 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 7256531 - 2² = 7256527 is a prime.

It is a super-2 number, since 2×7256531² = 105314484307922, which contains 22 as substring.

Together with 7256533, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 7256494 and 7256503.

It is not a weakly prime, because it can be changed into another prime (7256533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3628265 + 3628266.

It is an arithmetic number, because the mean of its divisors is an integer number (3628266).

Almost surely, 2^7256531 is an apocalyptic number.

7256531 is a deficient number, since it is larger than the sum of its proper divisors (1).

7256531 is an equidigital number, since it uses as much as digits as its factorization.

7256531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6300, while the sum is 29.

The square root of 7256531 is about 2693.7949068183. The cubic root of 7256531 is about 193.6019311301.

The spelling of 7256531 in words is "seven million, two hundred fifty-six thousand, five hundred thirty-one".