2188457 has 4 divisors (see below), whose sum is σ = 2241876. Its totient is φ = 2135040.

The previous prime is 2188451. The next prime is 2188463. The reversal of 2188457 is 7548812.

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

It is an interprime number because it is at equal distance from previous prime (2188451) and next prime (2188463).

It can be written as a sum of positive squares in 2 ways, for example, as 1297321 + 891136 = 1139^2 + 944^2 .

It is a cyclic number.

It is not a de Polignac number, because 2188457 - 2¹² = 2184361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2188451) 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, 26648 + ... + 26729.

It is an arithmetic number, because the mean of its divisors is an integer number (560469).

2^2188457 is an apocalyptic number.

It is an amenable number.

2188457 is a deficient number, since it is larger than the sum of its proper divisors (53419).

2188457 is an equidigital number, since it uses as much as digits as its factorization.

2188457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53418.

The product of its digits is 17920, while the sum is 35.

The square root of 2188457 is about 1479.3434354470. The cubic root of 2188457 is about 129.8312801363.

The spelling of 2188457 in words is "two million, one hundred eighty-eight thousand, four hundred fifty-seven".