7458421 has 2 divisors, whose sum is σ = 7458422. Its totient is φ = 7458420.

The previous prime is 7458419. The next prime is 7458443. The reversal of 7458421 is 1248547.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7349521 + 108900 = 2711^2 + 330^2 .

It is a cyclic number.

It is not a de Polignac number, because 7458421 - 2¹ = 7458419 is a prime.

Together with 7458419, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7453421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3729210 + 3729211.

It is an arithmetic number, because the mean of its divisors is an integer number (3729211).

Almost surely, 2^7458421 is an apocalyptic number.

It is an amenable number.

7458421 is a deficient number, since it is larger than the sum of its proper divisors (1).

7458421 is an equidigital number, since it uses as much as digits as its factorization.

7458421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8960, while the sum is 31.

The square root of 7458421 is about 2731.0109849651. The cubic root of 7458421 is about 195.3809864698.

The spelling of 7458421 in words is "seven million, four hundred fifty-eight thousand, four hundred twenty-one".