125648857 has 2 divisors, whose sum is σ = 125648858. Its totient is φ = 125648856.

The previous prime is 125648807. The next prime is 125648863. The reversal of 125648857 is 758846521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 94109401 + 31539456 = 9701^2 + 5616^2 .

It is a cyclic number.

It is not a de Polignac number, because 125648857 - 2¹⁹ = 125124569 is a prime.

It is not a weakly prime, because it can be changed into another prime (125648807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62824428 + 62824429.

It is an arithmetic number, because the mean of its divisors is an integer number (62824429).

Almost surely, 2^125648857 is an apocalyptic number.

It is an amenable number.

125648857 is a deficient number, since it is larger than the sum of its proper divisors (1).

125648857 is an equidigital number, since it uses as much as digits as its factorization.

125648857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 537600, while the sum is 46.

The square root of 125648857 is about 11209.3200953492. The cubic root of 125648857 is about 500.8636500250.

The spelling of 125648857 in words is "one hundred twenty-five million, six hundred forty-eight thousand, eight hundred fifty-seven".