7621121 has 8 divisors (see below), whose sum is σ = 7865088. Its totient is φ = 7380000.

The previous prime is 7621111. The next prime is 7621123. The reversal of 7621121 is 1211267.

7621121 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 7621121 - 2⁶ = 7621057 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7621093 and 7621102.

It is not an unprimeable number, because it can be changed into a prime (7621123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5576 + ... + 6806.

It is an arithmetic number, because the mean of its divisors is an integer number (983136).

Almost surely, 2^7621121 is an apocalyptic number.

It is an amenable number.

7621121 is a deficient number, since it is larger than the sum of its proper divisors (243967).

7621121 is a wasteful number, since it uses less digits than its factorization.

7621121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1423.

The product of its digits is 168, while the sum is 20.

The square root of 7621121 is about 2760.6377886278. The cubic root of 7621121 is about 196.7914771603.

Adding to 7621121 its reverse (1211267), we get a palindrome (8832388).

The spelling of 7621121 in words is "seven million, six hundred twenty-one thousand, one hundred twenty-one".