254781481 has 2 divisors, whose sum is σ = 254781482. Its totient is φ = 254781480.

The previous prime is 254781473. The next prime is 254781487. The reversal of 254781481 is 184187452.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 136515856 + 118265625 = 11684^2 + 10875^2 .

It is a cyclic number.

It is not a de Polignac number, because 254781481 - 2³ = 254781473 is a prime.

It is a super-2 number, since 2×254781481² = 129827206121106722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (254781487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127390740 + 127390741.

It is an arithmetic number, because the mean of its divisors is an integer number (127390741).

Almost surely, 2^254781481 is an apocalyptic number.

It is an amenable number.

254781481 is a deficient number, since it is larger than the sum of its proper divisors (1).

254781481 is an equidigital number, since it uses as much as digits as its factorization.

254781481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 71680, while the sum is 40.

The square root of 254781481 is about 15961.8758609381. The cubic root of 254781481 is about 633.9513814980.

The spelling of 254781481 in words is "two hundred fifty-four million, seven hundred eighty-one thousand, four hundred eighty-one".