7121936 has 20 divisors (see below), whose sum is σ = 14275500. Its totient is φ = 3437952.

The previous prime is 7121923. The next prime is 7121993. The reversal of 7121936 is 6391217.

It can be written as a sum of positive squares in 2 ways, for example, as 3041536 + 4080400 = 1744^2 + 2020^2 .

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a junction number, because it is equal to n+sod(n) for n = 7121899 and 7121908.

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, 7211 + ... + 8138.

It is an arithmetic number, because the mean of its divisors is an integer number (713775).

Almost surely, 2^7121936 is an apocalyptic number.

It is an amenable number.

7121936 is an abundant number, since it is smaller than the sum of its proper divisors (7153564).

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

7121936 is a wasteful number, since it uses less digits than its factorization.

7121936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15386 (or 15380 counting only the distinct ones).

The product of its digits is 2268, while the sum is 29.

The square root of 7121936 is about 2668.6955615057. The cubic root of 7121936 is about 192.3974694336.

The spelling of 7121936 in words is "seven million, one hundred twenty-one thousand, nine hundred thirty-six".