12400024251 has 8 divisors (see below), whose sum is σ = 16917862720. Its totient is φ = 8074434312.

The previous prime is 12400024229. The next prime is 12400024393. The reversal of 12400024251 is 15242000421.

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

It is not a de Polignac number, because 12400024251 - 2⁶ = 12400024187 is a prime.

It is a super-2 number, since 2×12400024251² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12400020251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48061981 + ... + 48062238.

It is an arithmetic number, because the mean of its divisors is an integer number (2114732840).

Almost surely, 2^12400024251 is an apocalyptic number.

12400024251 is a deficient number, since it is larger than the sum of its proper divisors (4517838469).

12400024251 is an equidigital number, since it uses as much as digits as its factorization.

12400024251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96124265.

The product of its (nonzero) digits is 640, while the sum is 21.

Adding to 12400024251 its reverse (15242000421), we get a palindrome (27642024672).

It can be divided in two parts, 1240002 and 4251, that added together give a triangular number (1244253 = T₁₅₇₇).

The spelling of 12400024251 in words is "twelve billion, four hundred million, twenty-four thousand, two hundred fifty-one".