7420531 has 2 divisors, whose sum is σ = 7420532. Its totient is φ = 7420530.

The previous prime is 7420529. The next prime is 7420537. The reversal of 7420531 is 1350247.

It is a weak prime.

It is an emirp because it is prime and its reverse (1350247) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7420531 - 2¹ = 7420529 is a prime.

It is a super-2 number, since 2×7420531² = 110128560643922, which contains 22 as substring.

Together with 7420529, it forms a pair of twin primes.

It is a Chen prime.

It is a zygodrome in base 3.

It is not a weakly prime, because it can be changed into another prime (7420537) 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, 3710265 + 3710266.

It is an arithmetic number, because the mean of its divisors is an integer number (3710266).

Almost surely, 2^7420531 is an apocalyptic number.

7420531 is a deficient number, since it is larger than the sum of its proper divisors (1).

7420531 is an equidigital number, since it uses as much as digits as its factorization.

7420531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 7420531 is about 2724.0651607478. The cubic root of 7420531 is about 195.0495688143.

Adding to 7420531 its reverse (1350247), we get a palindrome (8770778).

The spelling of 7420531 in words is "seven million, four hundred twenty thousand, five hundred thirty-one".