2451643 has 2 divisors, whose sum is σ = 2451644. Its totient is φ = 2451642.

The previous prime is 2451641. The next prime is 2451667. The reversal of 2451643 is 3461542.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2451643 - 2¹ = 2451641 is a prime.

Together with 2451641, it forms a pair of twin primes.

It is a plaindrome in base 16.

It is not a weakly prime, because it can be changed into another prime (2451641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1225821 + 1225822.

It is an arithmetic number, because the mean of its divisors is an integer number (1225822).

2^2451643 is an apocalyptic number.

2451643 is a deficient number, since it is larger than the sum of its proper divisors (1).

2451643 is an equidigital number, since it uses as much as digits as its factorization.

2451643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2880, while the sum is 25.

The square root of 2451643 is about 1565.7723333869. The cubic root of 2451643 is about 134.8401033283.

The spelling of 2451643 in words is "two million, four hundred fifty-one thousand, six hundred forty-three".