7121205 has 96 divisors (see below), whose sum is σ = 15934464. Its totient is φ = 2861568.

The previous prime is 7121203. The next prime is 7121209. The reversal of 7121205 is 5021217.

It is not a de Polignac number, because 7121205 - 2¹ = 7121203 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7121203) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 151492 + ... + 151538.

It is an arithmetic number, because the mean of its divisors is an integer number (165984).

Almost surely, 2^7121205 is an apocalyptic number.

It is an amenable number.

7121205 is an abundant number, since it is smaller than the sum of its proper divisors (8813259).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7121205 is a wasteful number, since it uses less digits than its factorization.

7121205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115 (or 112 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 18.

The square root of 7121205 is about 2668.5585996938. The cubic root of 7121205 is about 192.3908866092.

The spelling of 7121205 in words is "seven million, one hundred twenty-one thousand, two hundred five".