7121790 has 64 divisors (see below), whose sum is σ = 20462400. Its totient is φ = 1752192.

The previous prime is 7121773. The next prime is 7121801. The reversal of 7121790 is 971217.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2496 + ... + 4524.

It is an arithmetic number, because the mean of its divisors is an integer number (319725).

Almost surely, 2^7121790 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7121790, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10231200).

7121790 is an abundant number, since it is smaller than the sum of its proper divisors (13340610).

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

7121790 is a wasteful number, since it uses less digits than its factorization.

7121790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2058 (or 2052 counting only the distinct ones).

The product of its (nonzero) digits is 882, while the sum is 27.

The square root of 7121790 is about 2668.6682071775. The cubic root of 7121790 is about 192.3961547058.

The spelling of 7121790 in words is "seven million, one hundred twenty-one thousand, seven hundred ninety".