126886191 has 16 divisors (see below), whose sum is σ = 172229376. Its totient is φ = 83077056.

The previous prime is 126886183. The next prime is 126886241. The reversal of 126886191 is 191688621.

It is not a de Polignac number, because 126886191 - 2³ = 126886183 is a prime.

It is a super-2 number, since 2×126886191² = 32200210932976962, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126886121) 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, 56496 + ... + 58698.

It is an arithmetic number, because the mean of its divisors is an integer number (10764336).

Almost surely, 2^126886191 is an apocalyptic number.

126886191 is a deficient number, since it is larger than the sum of its proper divisors (45343185).

126886191 is a wasteful number, since it uses less digits than its factorization.

126886191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2542.

The product of its digits is 41472, while the sum is 42.

The square root of 126886191 is about 11264.3770799809. The cubic root of 126886191 is about 502.5023766626.

The spelling of 126886191 in words is "one hundred twenty-six million, eight hundred eighty-six thousand, one hundred ninety-one".