23781245 has 8 divisors (see below), whose sum is σ = 28858680. Its totient is φ = 18810880.

The previous prime is 23781239. The next prime is 23781253. The reversal of 23781245 is 54218732.

It can be written as a sum of positive squares in 4 ways, for example, as 1304164 + 22477081 = 1142^2 + 4741^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 23781245 - 2⁴ = 23781229 is a prime.

It is a super-2 number, since 2×23781245² = 1131095227500050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26276 + ... + 27165.

It is an arithmetic number, because the mean of its divisors is an integer number (3607335).

Almost surely, 2^23781245 is an apocalyptic number.

It is an amenable number.

23781245 is a deficient number, since it is larger than the sum of its proper divisors (5077435).

23781245 is an equidigital number, since it uses as much as digits as its factorization.

23781245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53535.

The product of its digits is 13440, while the sum is 32.

The square root of 23781245 is about 4876.6017881307. The cubic root of 23781245 is about 287.5708508432.

Adding to 23781245 its reverse (54218732), we get a palindrome (77999977).

The spelling of 23781245 in words is "twenty-three million, seven hundred eighty-one thousand, two hundred forty-five".