7115421 has 8 divisors (see below), whose sum is σ = 9515520. Its totient is φ = 4729472.

The previous prime is 7115417. The next prime is 7115473. The reversal of 7115421 is 1245117.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 7115421 - 2² = 7115417 is a prime.

7115421 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7115221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2301 + ... + 4418.

It is an arithmetic number, because the mean of its divisors is an integer number (1189440).

Almost surely, 2^7115421 is an apocalyptic number.

It is an amenable number.

7115421 is a deficient number, since it is larger than the sum of its proper divisors (2400099).

7115421 is a wasteful number, since it uses less digits than its factorization.

7115421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7075.

The product of its digits is 280, while the sum is 21.

The square root of 7115421 is about 2667.4746484269. The cubic root of 7115421 is about 192.3387844579.

The spelling of 7115421 in words is "seven million, one hundred fifteen thousand, four hundred twenty-one".