125400251 has 2 divisors, whose sum is σ = 125400252. Its totient is φ = 125400250.

The previous prime is 125400227. The next prime is 125400257. The reversal of 125400251 is 152004521.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 125400251 - 2¹⁰ = 125399227 is a prime.

It is not a weakly prime, because it can be changed into another prime (125400257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62700125 + 62700126.

It is an arithmetic number, because the mean of its divisors is an integer number (62700126).

Almost surely, 2^125400251 is an apocalyptic number.

125400251 is a deficient number, since it is larger than the sum of its proper divisors (1).

125400251 is an equidigital number, since it uses as much as digits as its factorization.

125400251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 125400251 is about 11198.2253504741. The cubic root of 125400251 is about 500.5330994080.

Adding to 125400251 its reverse (152004521), we get a palindrome (277404772).

The spelling of 125400251 in words is "one hundred twenty-five million, four hundred thousand, two hundred fifty-one".