7421985 has 48 divisors (see below), whose sum is σ = 13747968. Its totient is φ = 3696000.

The previous prime is 7421963. The next prime is 7421987. The reversal of 7421985 is 5891247.

It is not a de Polignac number, because 7421985 - 2⁷ = 7421857 is a prime.

It is a super-2 number, since 2×7421985² = 110171722680450, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7421987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 73435 + ... + 73535.

It is an arithmetic number, because the mean of its divisors is an integer number (286416).

Almost surely, 2^7421985 is an apocalyptic number.

It is an amenable number.

7421985 is a deficient number, since it is larger than the sum of its proper divisors (6325983).

7421985 is a wasteful number, since it uses less digits than its factorization.

7421985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206 (or 203 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 7421985 is about 2724.3320282227. The cubic root of 7421985 is about 195.0623075052.

The spelling of 7421985 in words is "seven million, four hundred twenty-one thousand, nine hundred eighty-five".