254640635 has 4 divisors (see below), whose sum is σ = 305568768. Its totient is φ = 203712504.

The previous prime is 254640629. The next prime is 254640643. The reversal of 254640635 is 536046452.

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 254640635 - 2¹⁶ = 254575099 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 254640595 and 254640604.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25464059 + ... + 25464068.

It is an arithmetic number, because the mean of its divisors is an integer number (76392192).

Almost surely, 2^254640635 is an apocalyptic number.

254640635 is a deficient number, since it is larger than the sum of its proper divisors (50928133).

254640635 is an equidigital number, since it uses as much as digits as its factorization.

254640635 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50928132.

The product of its (nonzero) digits is 86400, while the sum is 35.

The square root of 254640635 is about 15957.4633009135. The cubic root of 254640635 is about 633.8345415372.

The spelling of 254640635 in words is "two hundred fifty-four million, six hundred forty thousand, six hundred thirty-five".