1152085021 has 4 divisors (see below), whose sum is σ = 1183222492. Its totient is φ = 1120947552.

The previous prime is 1152085003. The next prime is 1152085049. The reversal of 1152085021 is 1205802511.

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 1007364121 + 144720900 = 31739^2 + 12030^2 .

It is a cyclic number.

It is not a de Polignac number, because 1152085021 - 2¹¹ = 1152082973 is a prime.

It is a super-2 number, since 2×1152085021² = 2654599791225140882, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1152085321) 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, 15568680 + ... + 15568753.

It is an arithmetic number, because the mean of its divisors is an integer number (295805623).

Almost surely, 2^1152085021 is an apocalyptic number.

It is an amenable number.

1152085021 is a deficient number, since it is larger than the sum of its proper divisors (31137471).

1152085021 is an equidigital number, since it uses as much as digits as its factorization.

1152085021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31137470.

The product of its (nonzero) digits is 800, while the sum is 25.

The square root of 1152085021 is about 33942.3779514636. The cubic root of 1152085021 is about 1048.3223461758.

Adding to 1152085021 its reverse (1205802511), we get a palindrome (2357887532).

It can be divided in two parts, 115 and 2085021, that added together give a 4-th power (2085136 = 38⁴).

The spelling of 1152085021 in words is "one billion, one hundred fifty-two million, eighty-five thousand, twenty-one".