254121391 has 2 divisors, whose sum is σ = 254121392. Its totient is φ = 254121390.

The previous prime is 254121377. The next prime is 254121463. The reversal of 254121391 is 193121452.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 254121391 - 2⁵ = 254121359 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (254121311) by changing a digit.

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 as a sum of consecutive naturals, namely, 127060695 + 127060696.

It is an arithmetic number, because the mean of its divisors is an integer number (127060696).

Almost surely, 2^254121391 is an apocalyptic number.

254121391 is a deficient number, since it is larger than the sum of its proper divisors (1).

254121391 is an equidigital number, since it uses as much as digits as its factorization.

254121391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2160, while the sum is 28.

The square root of 254121391 is about 15941.1853699780. The cubic root of 254121391 is about 633.4034258220.

It can be divided in two parts, 2541 and 21391, that added together give a palindrome (23932).

The spelling of 254121391 in words is "two hundred fifty-four million, one hundred twenty-one thousand, three hundred ninety-one".