125435257 has 4 divisors (see below), whose sum is σ = 128352400. Its totient is φ = 122518116.

The previous prime is 125435227. The next prime is 125435281. The reversal of 125435257 is 752534521.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 752534521 = 23767 ⋅31663.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125435257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125435227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1458507 + ... + 1458592.

It is an arithmetic number, because the mean of its divisors is an integer number (32088100).

Almost surely, 2^125435257 is an apocalyptic number.

It is an amenable number.

125435257 is a deficient number, since it is larger than the sum of its proper divisors (2917143).

125435257 is an equidigital number, since it uses as much as digits as its factorization.

125435257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2917142.

The product of its digits is 42000, while the sum is 34.

The square root of 125435257 is about 11199.7882569270. The cubic root of 125435257 is about 500.5796703715.

Adding to 125435257 its reverse (752534521), we get a palindrome (877969778).

The spelling of 125435257 in words is "one hundred twenty-five million, four hundred thirty-five thousand, two hundred fifty-seven".