24640042 has 12 divisors (see below), whose sum is σ = 42994530. Its totient is φ = 10559976.

The previous prime is 24640027. The next prime is 24640043. The reversal of 24640042 is 24004642.

It can be written as a sum of positive squares in only one way, i.e., 24216241 + 423801 = 4921^2 + 651^2 .

It is a junction number, because it is equal to n+sod(n) for n = 24639995 and 24640022.

It is not an unprimeable number, because it can be changed into a prime (24640043) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 125617 + ... + 125812.

Almost surely, 2^24640042 is an apocalyptic number.

24640042 is a deficient number, since it is larger than the sum of its proper divisors (18354488).

24640042 is a wasteful number, since it uses less digits than its factorization.

24640042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251445 (or 251438 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 24640042 is about 4963.8736889651. The cubic root of 24640042 is about 290.9916192876.

Adding to 24640042 its reverse (24004642), we get a palindrome (48644684).

The spelling of 24640042 in words is "twenty-four million, six hundred forty thousand, forty-two".