2187957 has 8 divisors (see below), whose sum is σ = 2944480. Its totient is φ = 1445040.

The previous prime is 2187953. The next prime is 2187959. The reversal of 2187957 is 7597812.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2187957 - 2² = 2187953 is a prime.

It is a Duffinian number.

2187957 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2187953) 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, 3019 + ... + 3672.

It is an arithmetic number, because the mean of its divisors is an integer number (368060).

2^2187957 is an apocalyptic number.

It is an amenable number.

2187957 is a deficient number, since it is larger than the sum of its proper divisors (756523).

2187957 is a wasteful number, since it uses less digits than its factorization.

2187957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6803.

The product of its digits is 35280, while the sum is 39.

The square root of 2187957 is about 1479.1744319045. The cubic root of 2187957 is about 129.8213918018.

It can be divided in two parts, 21 and 87957, that added together give a palindrome (87978).

The spelling of 2187957 in words is "two million, one hundred eighty-seven thousand, nine hundred fifty-seven".