1086956521 has 4 divisors (see below), whose sum is σ = 1242236032. Its totient is φ = 931677012.

The previous prime is 1086956501. The next prime is 1086956527. The reversal of 1086956521 is 1256596801.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1086956521 - 2¹⁷ = 1086825449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1086956527) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77639745 + ... + 77639758.

It is an arithmetic number, because the mean of its divisors is an integer number (310559008).

Almost surely, 2^1086956521 is an apocalyptic number.

It is an amenable number.

1086956521 is a deficient number, since it is larger than the sum of its proper divisors (155279511).

1086956521 is an equidigital number, since it uses as much as digits as its factorization.

1086956521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155279510.

The product of its (nonzero) digits is 129600, while the sum is 43.

The square root of 1086956521 is about 32969.0236585799. The cubic root of 1086956521 is about 1028.1837224689.

The spelling of 1086956521 in words is "one billion, eighty-six million, nine hundred fifty-six thousand, five hundred twenty-one".