126531075 has 24 divisors (see below), whose sum is σ = 228217536. Its totient is φ = 61348000.

The previous prime is 126531059. The next prime is 126531079. The reversal of 126531075 is 570135621.

It is not a de Polignac number, because 126531075 - 2⁴ = 126531059 is a prime.

It is a super-2 number, since 2×126531075² = 32020225881311250, which contains 22 as substring.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (126531079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 75861 + ... + 77510.

It is an arithmetic number, because the mean of its divisors is an integer number (9509064).

Almost surely, 2^126531075 is an apocalyptic number.

126531075 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

126531075 is a deficient number, since it is larger than the sum of its proper divisors (101686461).

126531075 is a wasteful number, since it uses less digits than its factorization.

126531075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153395 (or 153390 counting only the distinct ones).

The product of its (nonzero) digits is 6300, while the sum is 30.

The square root of 126531075 is about 11248.6032466258. The cubic root of 126531075 is about 502.0331546914.

Adding to 126531075 its reverse (570135621), we get a palindrome (696666696).

The spelling of 126531075 in words is "one hundred twenty-six million, five hundred thirty-one thousand, seventy-five".