7122418 has 4 divisors (see below), whose sum is σ = 10683630. Its totient is φ = 3561208.

The previous prime is 7122413. The next prime is 7122443. The reversal of 7122418 is 8142217.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 6487209 + 635209 = 2547^2 + 797^2 .

It is a junction number, because it is equal to n+sod(n) for n = 7122392 and 7122401.

It is not an unprimeable number, because it can be changed into a prime (7122413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1780603 + ... + 1780606.

Almost surely, 2^7122418 is an apocalyptic number.

7122418 is a deficient number, since it is larger than the sum of its proper divisors (3561212).

7122418 is a wasteful number, since it uses less digits than its factorization.

7122418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3561211.

The product of its digits is 896, while the sum is 25.

The square root of 7122418 is about 2668.7858662695. The cubic root of 7122418 is about 192.4018097089.

The spelling of 7122418 in words is "seven million, one hundred twenty-two thousand, four hundred eighteen".