8242415 has 4 divisors (see below), whose sum is σ = 9890904. Its totient is φ = 6593928.

The previous prime is 8242411. The next prime is 8242439. The reversal of 8242415 is 5142428.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 8242415 - 2² = 8242411 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8242411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 824237 + ... + 824246.

It is an arithmetic number, because the mean of its divisors is an integer number (2472726).

Almost surely, 2^8242415 is an apocalyptic number.

8242415 is a deficient number, since it is larger than the sum of its proper divisors (1648489).

8242415 is a wasteful number, since it uses less digits than its factorization.

8242415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1648488.

The product of its digits is 2560, while the sum is 26.

The square root of 8242415 is about 2870.9606406219. The cubic root of 8242415 is about 202.0000571839. Note that the first 4 decimals are identical.

The spelling of 8242415 in words is "eight million, two hundred forty-two thousand, four hundred fifteen".