7421251 has 2 divisors, whose sum is σ = 7421252. Its totient is φ = 7421250.

The previous prime is 7421237. The next prime is 7421257. The reversal of 7421251 is 1521247.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 7421251 - 2⁹ = 7420739 is a prime.

It is not a weakly prime, because it can be changed into another prime (7421257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3710625 + 3710626.

It is an arithmetic number, because the mean of its divisors is an integer number (3710626).

Almost surely, 2^7421251 is an apocalyptic number.

7421251 is a deficient number, since it is larger than the sum of its proper divisors (1).

7421251 is an equidigital number, since it uses as much as digits as its factorization.

7421251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 560, while the sum is 22.

The square root of 7421251 is about 2724.1973129713. The cubic root of 7421251 is about 195.0558770398.

Adding to 7421251 its reverse (1521247), we get a palindrome (8942498).

The spelling of 7421251 in words is "seven million, four hundred twenty-one thousand, two hundred fifty-one".