2478751 has 4 divisors (see below), whose sum is σ = 2704104. Its totient is φ = 2253400.

The previous prime is 2478743. The next prime is 2478761. The reversal of 2478751 is 1578742.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 2478751 - 2³ = 2478743 is a prime.

It is a super-2 number, since 2×2478751² = 12288413040002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2478731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112660 + ... + 112681.

It is an arithmetic number, because the mean of its divisors is an integer number (676026).

2^2478751 is an apocalyptic number.

2478751 is a deficient number, since it is larger than the sum of its proper divisors (225353).

2478751 is a wasteful number, since it uses less digits than its factorization.

2478751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225352.

The product of its digits is 15680, while the sum is 34.

The square root of 2478751 is about 1574.4049669637. The cubic root of 2478751 is about 135.3352618220.

Subtracting from 2478751 its reverse (1578742), we obtain a palindrome (900009).

It can be divided in two parts, 247 and 8751, that added together give a palindrome (8998).

The spelling of 2478751 in words is "two million, four hundred seventy-eight thousand, seven hundred fifty-one".