7208121 has 4 divisors (see below), whose sum is σ = 9610832. Its totient is φ = 4805412.

The previous prime is 7208107. The next prime is 7208129. The reversal of 7208121 is 1218027.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 7208121 - 2²² = 3013817 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7208129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1201351 + ... + 1201356.

It is an arithmetic number, because the mean of its divisors is an integer number (2402708).

Almost surely, 2^7208121 is an apocalyptic number.

It is an amenable number.

7208121 is a deficient number, since it is larger than the sum of its proper divisors (2402711).

7208121 is a wasteful number, since it uses less digits than its factorization.

7208121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2402710.

The product of its (nonzero) digits is 224, while the sum is 21.

The square root of 7208121 is about 2684.7944055365. The cubic root of 7208121 is about 193.1704490807.

The spelling of 7208121 in words is "seven million, two hundred eight thousand, one hundred twenty-one".