125342281 has 2 divisors, whose sum is σ = 125342282. Its totient is φ = 125342280.

The previous prime is 125342257. The next prime is 125342311. The reversal of 125342281 is 182243521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81000000 + 44342281 = 9000^2 + 6659^2 .

It is a cyclic number.

It is not a de Polignac number, because 125342281 - 2⁷ = 125342153 is a prime.

It is a super-2 number, since 2×125342281² = 31421374812565922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (125342081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62671140 + 62671141.

It is an arithmetic number, because the mean of its divisors is an integer number (62671141).

Almost surely, 2^125342281 is an apocalyptic number.

It is an amenable number.

125342281 is a deficient number, since it is larger than the sum of its proper divisors (1).

125342281 is an equidigital number, since it uses as much as digits as its factorization.

125342281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3840, while the sum is 28.

The square root of 125342281 is about 11195.6366947128. The cubic root of 125342281 is about 500.4559587435.

It can be divided in two parts, 1253 and 42281, that added together give a palindrome (43534).

The spelling of 125342281 in words is "one hundred twenty-five million, three hundred forty-two thousand, two hundred eighty-one".