7421489 has 2 divisors, whose sum is σ = 7421490. Its totient is φ = 7421488.

The previous prime is 7421471. The next prime is 7421509. The reversal of 7421489 is 9841247.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4376464 + 3045025 = 2092^2 + 1745^2 .

It is a cyclic number.

It is not a de Polignac number, because 7421489 - 2¹² = 7417393 is a prime.

It is a d-powerful number, because it can be written as 7⁵ + 4² + 2¹⁹ + 1 + 4⁴ + 8⁷ + 9⁷ .

It is a zygodrome in base 3.

It is not a weakly prime, because it can be changed into another prime (7423489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3710744 + 3710745.

It is an arithmetic number, because the mean of its divisors is an integer number (3710745).

Almost surely, 2^7421489 is an apocalyptic number.

It is an amenable number.

7421489 is a deficient number, since it is larger than the sum of its proper divisors (1).

7421489 is an equidigital number, since it uses as much as digits as its factorization.

7421489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16128, while the sum is 35.

The square root of 7421489 is about 2724.2409952132. The cubic root of 7421489 is about 195.0579621690.

The spelling of 7421489 in words is "seven million, four hundred twenty-one thousand, four hundred eighty-nine".