23781242 has 4 divisors (see below), whose sum is σ = 35671866. Its totient is φ = 11890620.

The previous prime is 23781239. The next prime is 23781253. The reversal of 23781242 is 24218732.

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

It can be written as a sum of positive squares in only one way, i.e., 15202201 + 8579041 = 3899^2 + 2929^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5945309 + ... + 5945312.

Almost surely, 2^23781242 is an apocalyptic number.

23781242 is a deficient number, since it is larger than the sum of its proper divisors (11890624).

23781242 is a wasteful number, since it uses less digits than its factorization.

23781242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11890623.

The product of its digits is 5376, while the sum is 29.

The square root of 23781242 is about 4876.6014805395. The cubic root of 23781242 is about 287.5708387509.

Adding to 23781242 its reverse (24218732), we get a palindrome (47999974).

The spelling of 23781242 in words is "twenty-three million, seven hundred eighty-one thousand, two hundred forty-two".