7122738 has 32 divisors (see below), whose sum is σ = 16617600. Its totient is φ = 2034480.

The previous prime is 7122733. The next prime is 7122743. The reversal of 7122738 is 8372217.

It is an interprime number because it is at equal distance from previous prime (7122733) and next prime (7122743).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7122733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 328 + ... + 3788.

It is an arithmetic number, because the mean of its divisors is an integer number (519300).

Almost surely, 2^7122738 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7122738, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8308800).

7122738 is an abundant number, since it is smaller than the sum of its proper divisors (9494862).

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

7122738 is a wasteful number, since it uses less digits than its factorization.

7122738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3487 (or 3473 counting only the distinct ones).

The product of its digits is 4704, while the sum is 30.

The square root of 7122738 is about 2668.8458179520. The cubic root of 7122738 is about 192.4046911113.

The spelling of 7122738 in words is "seven million, one hundred twenty-two thousand, seven hundred thirty-eight".