254345981 has 4 divisors (see below), whose sum is σ = 254677500. Its totient is φ = 254014464.

The previous prime is 254345969. The next prime is 254346007. The reversal of 254345981 is 189543452.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 32604100 + 221741881 = 5710^2 + 14891^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-254345981 is a prime.

It is a super-2 number, since 2×254345981² = 129383756101704722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (254345081) 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, 164606 + ... + 166143.

It is an arithmetic number, because the mean of its divisors is an integer number (63669375).

Almost surely, 2^254345981 is an apocalyptic number.

It is an amenable number.

254345981 is a deficient number, since it is larger than the sum of its proper divisors (331519).

254345981 is an equidigital number, since it uses as much as digits as its factorization.

254345981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331518.

The product of its digits is 172800, while the sum is 41.

The square root of 254345981 is about 15948.2281460982. The cubic root of 254345981 is about 633.5899694619.

The spelling of 254345981 in words is "two hundred fifty-four million, three hundred forty-five thousand, nine hundred eighty-one".