126533257 has 4 divisors (see below), whose sum is σ = 129619476. Its totient is φ = 123447040.

The previous prime is 126533233. The next prime is 126533279. The reversal of 126533257 is 752335621.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 28344976 + 98188281 = 5324^2 + 9909^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126533257 is a prime.

It is a super-3 number, since 3×126533257³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126533287) 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, 1543048 + ... + 1543129.

It is an arithmetic number, because the mean of its divisors is an integer number (32404869).

Almost surely, 2^126533257 is an apocalyptic number.

It is an amenable number.

126533257 is a deficient number, since it is larger than the sum of its proper divisors (3086219).

126533257 is an equidigital number, since it uses as much as digits as its factorization.

126533257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3086218.

The product of its digits is 37800, while the sum is 34.

The square root of 126533257 is about 11248.7002360273. The cubic root of 126533257 is about 502.0360404911.

Adding to 126533257 its reverse (752335621), we get a palindrome (878868878).

The spelling of 126533257 in words is "one hundred twenty-six million, five hundred thirty-three thousand, two hundred fifty-seven".