7872257 has 4 divisors (see below), whose sum is σ = 7886256. Its totient is φ = 7858260.

The previous prime is 7872239. The next prime is 7872269. The reversal of 7872257 is 7522787.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 7872257 - 2⁸ = 7872001 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7872257.

It is not an unprimeable number, because it can be changed into a prime (7872217) 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, 6119 + ... + 7292.

It is an arithmetic number, because the mean of its divisors is an integer number (1971564).

Almost surely, 2^7872257 is an apocalyptic number.

It is an amenable number.

7872257 is a deficient number, since it is larger than the sum of its proper divisors (13999).

7872257 is a wasteful number, since it uses less digits than its factorization.

7872257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13998.

The product of its digits is 54880, while the sum is 38.

The square root of 7872257 is about 2805.7542657902. The cubic root of 7872257 is about 198.9297581273.

The spelling of 7872257 in words is "seven million, eight hundred seventy-two thousand, two hundred fifty-seven".