126881585 has 12 divisors (see below), whose sum is σ = 154591668. Its totient is φ = 99972576.

The previous prime is 126881581. The next prime is 126881611. The reversal of 126881585 is 585188621.

It can be written as a sum of positive squares in 2 ways, for example, as 73547776 + 53333809 = 8576^2 + 7303^2 .

It is not a de Polignac number, because 126881585 - 2² = 126881581 is a prime.

It is a super-2 number, since 2×126881585² = 32197873224224450, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126881581) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19619 + ... + 25271.

It is an arithmetic number, because the mean of its divisors is an integer number (12882639).

Almost surely, 2^126881585 is an apocalyptic number.

It is an amenable number.

126881585 is a deficient number, since it is larger than the sum of its proper divisors (27710083).

126881585 is an frugal number, since it uses more digits than its factorization.

126881585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5792 (or 5725 counting only the distinct ones).

The product of its digits is 153600, while the sum is 44.

The square root of 126881585 is about 11264.1726282937. The cubic root of 126881585 is about 502.4962962690.

The spelling of 126881585 in words is "one hundred twenty-six million, eight hundred eighty-one thousand, five hundred eighty-five".