126815997 has 32 divisors (see below), whose sum is σ = 219985920. Its totient is φ = 63011520.

The previous prime is 126815989. The next prime is 126815999. The reversal of 126815997 is 799518621.

It is not a de Polignac number, because 126815997 - 2³ = 126815989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126815999) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6622 + ... + 17247.

It is an arithmetic number, because the mean of its divisors is an integer number (6874560).

Almost surely, 2^126815997 is an apocalyptic number.

It is an amenable number.

126815997 is a deficient number, since it is larger than the sum of its proper divisors (93169923).

126815997 is a wasteful number, since it uses less digits than its factorization.

126815997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23913.

The product of its digits is 272160, while the sum is 48.

The square root of 126815997 is about 11261.2608974306. The cubic root of 126815997 is about 502.4096973939.

The spelling of 126815997 in words is "one hundred twenty-six million, eight hundred fifteen thousand, nine hundred ninety-seven".