125143257 has 4 divisors (see below), whose sum is σ = 166857680. Its totient is φ = 83428836.

The previous prime is 125143237. The next prime is 125143259. The reversal of 125143257 is 752341521.

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: 752341521 = 3 ⋅250780507.

It is not a de Polignac number, because 125143257 - 2⁷ = 125143129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125143259) 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, 20857207 + ... + 20857212.

It is an arithmetic number, because the mean of its divisors is an integer number (41714420).

Almost surely, 2^125143257 is an apocalyptic number.

It is an amenable number.

125143257 is a deficient number, since it is larger than the sum of its proper divisors (41714423).

125143257 is an equidigital number, since it uses as much as digits as its factorization.

125143257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41714422.

The product of its digits is 8400, while the sum is 30.

The square root of 125143257 is about 11186.7447007608. The cubic root of 125143257 is about 500.1909364106.

Adding to 125143257 its reverse (752341521), we get a palindrome (877484778).

The spelling of 125143257 in words is "one hundred twenty-five million, one hundred forty-three thousand, two hundred fifty-seven".