254505391 has 4 divisors (see below), whose sum is σ = 290863312. Its totient is φ = 218147472.

The previous prime is 254505389. The next prime is 254505397. The reversal of 254505391 is 193505452.

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 254505391 - 2¹ = 254505389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (254505397) 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, 18178950 + ... + 18178963.

It is an arithmetic number, because the mean of its divisors is an integer number (72715828).

Almost surely, 2^254505391 is an apocalyptic number.

254505391 is a deficient number, since it is larger than the sum of its proper divisors (36357921).

254505391 is an equidigital number, since it uses as much as digits as its factorization.

254505391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36357920.

The product of its (nonzero) digits is 27000, while the sum is 34.

The square root of 254505391 is about 15953.2250971394. The cubic root of 254505391 is about 633.7223082070.

The spelling of 254505391 in words is "two hundred fifty-four million, five hundred five thousand, three hundred ninety-one".