1086540921 has 12 divisors (see below), whose sum is σ = 1570710960. Its totient is φ = 723777720.

The previous prime is 1086540901. The next prime is 1086540947. The reversal of 1086540921 is 1290456801.

1086540921 is a `hidden beast` number, since 10 + 86 + 540 + 9 + 21 = 666.

It is not a de Polignac number, because 1086540921 - 2¹⁸ = 1086278777 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1086540901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36615 + ... + 59276.

It is an arithmetic number, because the mean of its divisors is an integer number (130892580).

Almost surely, 2^1086540921 is an apocalyptic number.

It is an amenable number.

1086540921 is a deficient number, since it is larger than the sum of its proper divisors (484170039).

1086540921 is a wasteful number, since it uses less digits than its factorization.

1086540921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97156 (or 97153 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 1086540921 is about 32962.7201699132. The cubic root of 1086540921 is about 1028.0526630629.

The spelling of 1086540921 in words is "one billion, eighty-six million, five hundred forty thousand, nine hundred twenty-one".