7621985 has 8 divisors (see below), whose sum is σ = 10453056. Its totient is φ = 5226480.

The previous prime is 7621981. The next prime is 7621997. The reversal of 7621985 is 5891267.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 7621985 - 2² = 7621981 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7621981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108851 + ... + 108920.

It is an arithmetic number, because the mean of its divisors is an integer number (1306632).

Almost surely, 2^7621985 is an apocalyptic number.

It is an amenable number.

7621985 is a deficient number, since it is larger than the sum of its proper divisors (2831071).

7621985 is a wasteful number, since it uses less digits than its factorization.

7621985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217783.

The product of its digits is 30240, while the sum is 38.

The square root of 7621985 is about 2760.7942697709. The cubic root of 7621985 is about 196.7989135733.

The spelling of 7621985 in words is "seven million, six hundred twenty-one thousand, nine hundred eighty-five".