7211090 has 8 divisors (see below), whose sum is σ = 12979980. Its totient is φ = 2884432.

The previous prime is 7211081. The next prime is 7211093. The reversal of 7211090 is 901127.

It can be written as a sum of positive squares in 2 ways, for example, as 6205081 + 1006009 = 2491^2 + 1003^2 .

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7211093) 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, 360545 + ... + 360564.

Almost surely, 2^7211090 is an apocalyptic number.

7211090 is a deficient number, since it is larger than the sum of its proper divisors (5768890).

7211090 is a wasteful number, since it uses less digits than its factorization.

7211090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 721116.

The product of its (nonzero) digits is 126, while the sum is 20.

The square root of 7211090 is about 2685.3472773554. The cubic root of 7211090 is about 193.1969675191.

The spelling of 7211090 in words is "seven million, two hundred eleven thousand, ninety".