1152451021 has 4 divisors (see below), whose sum is σ = 1156611772. Its totient is φ = 1148290272.

The previous prime is 1152451019. The next prime is 1152451031. The reversal of 1152451021 is 1201542511.

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 474629796 + 677821225 = 21786^2 + 26035^2 .

It is a cyclic number.

It is not a de Polignac number, because 1152451021 - 2¹ = 1152451019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1152450983 and 1152451001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1152451031) 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, 2079960 + ... + 2080513.

It is an arithmetic number, because the mean of its divisors is an integer number (289152943).

Almost surely, 2^1152451021 is an apocalyptic number.

It is an amenable number.

1152451021 is a deficient number, since it is larger than the sum of its proper divisors (4160751).

1152451021 is an equidigital number, since it uses as much as digits as its factorization.

1152451021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4160750.

The product of its (nonzero) digits is 400, while the sum is 22.

The square root of 1152451021 is about 33947.7690135891. The cubic root of 1152451021 is about 1048.4333464777.

Adding to 1152451021 its reverse (1201542511), we get a palindrome (2353993532).

The spelling of 1152451021 in words is "one billion, one hundred fifty-two million, four hundred fifty-one thousand, twenty-one".