126531897 has 16 divisors (see below), whose sum is σ = 173626560. Its totient is φ = 81905472.

The previous prime is 126531893. The next prime is 126531913. The reversal of 126531897 is 798135621.

It is not a de Polignac number, because 126531897 - 2² = 126531893 is a prime.

It is not an unprimeable number, because it can be changed into a prime (126531893) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74979 + ... + 76647.

It is an arithmetic number, because the mean of its divisors is an integer number (10851660).

Almost surely, 2^126531897 is an apocalyptic number.

It is an amenable number.

126531897 is a deficient number, since it is larger than the sum of its proper divisors (47094663).

126531897 is a wasteful number, since it uses less digits than its factorization.

126531897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2392.

The product of its digits is 90720, while the sum is 42.

The square root of 126531897 is about 11248.6397844362. The cubic root of 126531897 is about 502.0342418297.

The spelling of 126531897 in words is "one hundred twenty-six million, five hundred thirty-one thousand, eight hundred ninety-seven".