25451243 has 4 divisors (see below), whose sum is σ = 25882680. Its totient is φ = 25019808.

The previous prime is 25451233. The next prime is 25451249. The reversal of 25451243 is 34215452.

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 25451243 - 2¹⁰ = 25450219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25451249) 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, 215630 + ... + 215747.

It is an arithmetic number, because the mean of its divisors is an integer number (6470670).

Almost surely, 2^25451243 is an apocalyptic number.

25451243 is a deficient number, since it is larger than the sum of its proper divisors (431437).

25451243 is an equidigital number, since it uses as much as digits as its factorization.

25451243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431436.

The product of its digits is 4800, while the sum is 26.

The square root of 25451243 is about 5044.9224969270. The cubic root of 25451243 is about 294.1505507181.

Adding to 25451243 its reverse (34215452), we get a palindrome (59666695).

The spelling of 25451243 in words is "twenty-five million, four hundred fifty-one thousand, two hundred forty-three".