1150552021 has 4 divisors (see below), whose sum is σ = 1156908844. Its totient is φ = 1144195200.

The previous prime is 1150552009. The next prime is 1150552031. The reversal of 1150552021 is 1202550511.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 599711121 + 550840900 = 24489^2 + 23470^2 .

It is a cyclic number.

It is not a de Polignac number, because 1150552021 - 2¹³ = 1150543829 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1150551983 and 1150552001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1150552031) 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 3 ways as a sum of consecutive naturals, for example, 3178140 + ... + 3178501.

It is an arithmetic number, because the mean of its divisors is an integer number (289227211).

Almost surely, 2^1150552021 is an apocalyptic number.

It is an amenable number.

1150552021 is a deficient number, since it is larger than the sum of its proper divisors (6356823).

1150552021 is an equidigital number, since it uses as much as digits as its factorization.

1150552021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6356822.

The product of its (nonzero) digits is 500, while the sum is 22.

The square root of 1150552021 is about 33919.7880447387. The cubic root of 1150552021 is about 1047.8571630617.

The spelling of 1150552021 in words is "one billion, one hundred fifty million, five hundred fifty-two thousand, twenty-one".