7420251 has 8 divisors (see below), whose sum is σ = 9931264. Its totient is φ = 4928040.

The previous prime is 7420243. The next prime is 7420261. The reversal of 7420251 is 1520247.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 7420251 - 2³ = 7420243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7420261) 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 7 ways as a sum of consecutive naturals, for example, 3751 + ... + 5376.

It is an arithmetic number, because the mean of its divisors is an integer number (1241408).

Almost surely, 2^7420251 is an apocalyptic number.

7420251 is a deficient number, since it is larger than the sum of its proper divisors (2511013).

7420251 is a wasteful number, since it uses less digits than its factorization.

7420251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9401.

The product of its (nonzero) digits is 560, while the sum is 21.

The square root of 7420251 is about 2724.0137664850. The cubic root of 7420251 is about 195.0471155053.

Adding to 7420251 its reverse (1520247), we get a palindrome (8940498).

The spelling of 7420251 in words is "seven million, four hundred twenty thousand, two hundred fifty-one".