7342421 has 2 divisors, whose sum is σ = 7342422. Its totient is φ = 7342420.

The previous prime is 7342409. The next prime is 7342441. The reversal of 7342421 is 1242437.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3845521 + 3496900 = 1961^2 + 1870^2 .

It is a cyclic number.

It is not a de Polignac number, because 7342421 - 2¹⁸ = 7080277 is a prime.

It is a super-2 number, since 2×7342421² = 107822292282482, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7342441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3671210 + 3671211.

It is an arithmetic number, because the mean of its divisors is an integer number (3671211).

Almost surely, 2^7342421 is an apocalyptic number.

It is an amenable number.

7342421 is a deficient number, since it is larger than the sum of its proper divisors (1).

7342421 is an equidigital number, since it uses as much as digits as its factorization.

7342421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1344, while the sum is 23.

The square root of 7342421 is about 2709.6902036949. The cubic root of 7342421 is about 194.3627763945.

Adding to 7342421 its reverse (1242437), we get a palindrome (8584858).

The spelling of 7342421 in words is "seven million, three hundred forty-two thousand, four hundred twenty-one".