7421949 has 14 divisors (see below), whose sum is σ = 11128926. Its totient is φ = 4947480.

The previous prime is 7421923. The next prime is 7421963. The reversal of 7421949 is 9491247.

It can be written as a sum of positive squares in only one way, i.e., 6579225 + 842724 = 2565^2 + 918^2 .

It is not a de Polignac number, because 7421949 - 2⁸ = 7421693 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7421849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 4362 + ... + 5819.

Almost surely, 2^7421949 is an apocalyptic number.

It is an amenable number.

7421949 is a deficient number, since it is larger than the sum of its proper divisors (3706977).

7421949 is an equidigital number, since it uses as much as digits as its factorization.

7421949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10199 (or 10184 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 7421949 is about 2724.3254210905. The cubic root of 7421949 is about 195.0619921244.

The spelling of 7421949 in words is "seven million, four hundred twenty-one thousand, nine hundred forty-nine".