2400523 has 4 divisors (see below), whose sum is σ = 2465440. Its totient is φ = 2335608.

The previous prime is 2400521. The next prime is 2400551. The reversal of 2400523 is 3250042.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3250042 = 2 ⋅1625021.

It is a cyclic number.

It is not a de Polignac number, because 2400523 - 2¹ = 2400521 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2400497 and 2400506.

It is not an unprimeable number, because it can be changed into a prime (2400521) 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, 32403 + ... + 32476.

It is an arithmetic number, because the mean of its divisors is an integer number (616360).

2^2400523 is an apocalyptic number.

2400523 is a deficient number, since it is larger than the sum of its proper divisors (64917).

2400523 is an equidigital number, since it uses as much as digits as its factorization.

2400523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64916.

The product of its (nonzero) digits is 240, while the sum is 16.

The square root of 2400523 is about 1549.3621268122. The cubic root of 2400523 is about 133.8963146832.

Adding to 2400523 its reverse (3250042), we get a palindrome (5650565).

The spelling of 2400523 in words is "two million, four hundred thousand, five hundred twenty-three".