248781121 has 2 divisors, whose sum is σ = 248781122. Its totient is φ = 248781120.

The previous prime is 248781103. The next prime is 248781131. The reversal of 248781121 is 121187842.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 247905025 + 876096 = 15745^2 + 936^2 .

It is a cyclic number.

It is not a de Polignac number, because 248781121 - 2¹¹ = 248779073 is a prime.

It is not a weakly prime, because it can be changed into another prime (248781131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124390560 + 124390561.

It is an arithmetic number, because the mean of its divisors is an integer number (124390561).

Almost surely, 2^248781121 is an apocalyptic number.

It is an amenable number.

248781121 is a deficient number, since it is larger than the sum of its proper divisors (1).

248781121 is an equidigital number, since it uses as much as digits as its factorization.

248781121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7168, while the sum is 34.

The square root of 248781121 is about 15772.7968667577. The cubic root of 248781121 is about 628.9350623781.

The spelling of 248781121 in words is "two hundred forty-eight million, seven hundred eighty-one thousand, one hundred twenty-one".