7420247 has 4 divisors (see below), whose sum is σ = 7429800. Its totient is φ = 7410696.

The previous prime is 7420243. The next prime is 7420261.

7420247 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 7420247 - 2² = 7420243 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7420243) 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 in 3 ways as a sum of consecutive naturals, for example, 3497 + ... + 5202.

It is an arithmetic number, because the mean of its divisors is an integer number (1857450).

Almost surely, 2^7420247 is an apocalyptic number.

7420247 is a deficient number, since it is larger than the sum of its proper divisors (9553).

7420247 is an equidigital number, since it uses as much as digits as its factorization.

7420247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9552.

The product of its (nonzero) digits is 3136, while the sum is 26.

The square root of 7420247 is about 2724.0130322743. The cubic root of 7420247 is about 195.0470804576.

It can be divided in two parts, 7420 and 247, that added together give a palindrome (7667).

The spelling of 7420247 in words is "seven million, four hundred twenty thousand, two hundred forty-seven".