82126491 has 16 divisors (see below), whose sum is σ = 114664704. Its totient is φ = 52186464.

The previous prime is 82126487. The next prime is 82126501. The reversal of 82126491 is 19462128.

It is not a de Polignac number, because 82126491 - 2² = 82126487 is a prime.

It is not an unprimeable number, because it can be changed into a prime (82126391) 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, 19245 + ... + 23121.

It is an arithmetic number, because the mean of its divisors is an integer number (7166544).

Almost surely, 2^82126491 is an apocalyptic number.

82126491 is a deficient number, since it is larger than the sum of its proper divisors (32538213).

82126491 is a wasteful number, since it uses less digits than its factorization.

82126491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4210.

The product of its digits is 6912, while the sum is 33.

The square root of 82126491 is about 9062.3667438479. The cubic root of 82126491 is about 434.6714231631.

The spelling of 82126491 in words is "eighty-two million, one hundred twenty-six thousand, four hundred ninety-one".