7872557 has 8 divisors (see below), whose sum is σ = 9815232. Its totient is φ = 6134400.

The previous prime is 7872541. The next prime is 7872559. The reversal of 7872557 is 7552787.

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 7872557 - 2⁴ = 7872541 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7872559) 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, 51044 + ... + 51197.

It is an arithmetic number, because the mean of its divisors is an integer number (1226904).

Almost surely, 2^7872557 is an apocalyptic number.

7872557 is a gapful number since it is divisible by the number (77) formed by its first and last digit.

It is an amenable number.

7872557 is a deficient number, since it is larger than the sum of its proper divisors (1942675).

7872557 is a wasteful number, since it uses less digits than its factorization.

7872557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102259.

The product of its digits is 137200, while the sum is 41.

The square root of 7872557 is about 2805.8077268409. The cubic root of 7872557 is about 198.9322850675.

The spelling of 7872557 in words is "seven million, eight hundred seventy-two thousand, five hundred fifty-seven".