7122890 has 8 divisors (see below), whose sum is σ = 12821220. Its totient is φ = 2849152.

The previous prime is 7122887. The next prime is 7122953. The reversal of 7122890 is 982217.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 7006609 + 116281 = 2647^2 + 341^2 .

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 356135 + ... + 356154.

Almost surely, 2^7122890 is an apocalyptic number.

7122890 is a deficient number, since it is larger than the sum of its proper divisors (5698330).

7122890 is a wasteful number, since it uses less digits than its factorization.

7122890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 712296.

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 7122890 is about 2668.8742945294. The cubic root of 7122890 is about 192.4060597472.

It can be divided in two parts, 7122 and 890, that multiplied together give a triangular number (6338580 = T₃₅₆₀).

The spelling of 7122890 in words is "seven million, one hundred twenty-two thousand, eight hundred ninety".