2187464 has 8 divisors (see below), whose sum is σ = 4101510. Its totient is φ = 1093728.

The previous prime is 2187463. The next prime is 2187491. The reversal of 2187464 is 4647812.

It can be written as a sum of positive squares in only one way, i.e., 1612900 + 574564 = 1270^2 + 758^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a d-powerful number, because it can be written as 2⁷ + 1 + 8⁷ + 7⁵ + 4³ + 6⁵ + 4⁸ .

It is a self number, because there is not a number n which added to its sum of digits gives 2187464.

It is not an unprimeable number, because it can be changed into a prime (2187463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 136709 + ... + 136724.

2^2187464 is an apocalyptic number.

It is an amenable number.

2187464 is a deficient number, since it is larger than the sum of its proper divisors (1914046).

2187464 is a wasteful number, since it uses less digits than its factorization.

2187464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273439 (or 273435 counting only the distinct ones).

The product of its digits is 10752, while the sum is 32.

The square root of 2187464 is about 1479.0077755036. The cubic root of 2187464 is about 129.8116404289.

Subtracting from 2187464 its product of digits (10752), we obtain a palindrome (2176712).

The spelling of 2187464 in words is "two million, one hundred eighty-seven thousand, four hundred sixty-four".