7878245 has 8 divisors (see below), whose sum is σ = 9674016. Its totient is φ = 6155856.

The previous prime is 7878239. The next prime is 7878251. The reversal of 7878245 is 5428787.

It is an interprime number because it is at equal distance from previous prime (7878239) and next prime (7878251).

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 7878245 - 2⁴ = 7878229 is a prime.

It is a d-powerful number, because it can be written as 7³ + 8² + 7⁸ + 8⁷ + 2⁸ + 4 + 5⁶ .

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18107 + ... + 18536.

It is an arithmetic number, because the mean of its divisors is an integer number (1209252).

Almost surely, 2^7878245 is an apocalyptic number.

It is an amenable number.

7878245 is a deficient number, since it is larger than the sum of its proper divisors (1795771).

7878245 is a wasteful number, since it uses less digits than its factorization.

7878245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36691.

The product of its digits is 125440, while the sum is 41.

The square root of 7878245 is about 2806.8211556848. The cubic root of 7878245 is about 198.9801837123.

The spelling of 7878245 in words is "seven million, eight hundred seventy-eight thousand, two hundred forty-five".