2421252451 has 4 divisors (see below), whose sum is σ = 2422082592. Its totient is φ = 2420422312.

The previous prime is 2421252419. The next prime is 2421252461. The reversal of 2421252451 is 1542521242.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1542521242 = 2 ⋅771260621.

It is a cyclic number.

It is not a de Polignac number, because 2421252451 - 2⁵ = 2421252419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2421252401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 410680 + ... + 416533.

It is an arithmetic number, because the mean of its divisors is an integer number (605520648).

Almost surely, 2^2421252451 is an apocalyptic number.

2421252451 is a deficient number, since it is larger than the sum of its proper divisors (830141).

2421252451 is an equidigital number, since it uses as much as digits as its factorization.

2421252451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 830140.

The product of its digits is 6400, while the sum is 28.

The square root of 2421252451 is about 49206.2237018855. The cubic root of 2421252451 is about 1342.8062617839.

Adding to 2421252451 its reverse (1542521242), we get a palindrome (3963773693).

The spelling of 2421252451 in words is "two billion, four hundred twenty-one million, two hundred fifty-two thousand, four hundred fifty-one".