1151340521 has 4 divisors (see below), whose sum is σ = 1219066452. Its totient is φ = 1083614592.

The previous prime is 1151340497. The next prime is 1151340577. The reversal of 1151340521 is 1250431511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1250431511 = 7 ⋅178633073.

It can be written as a sum of positive squares in 2 ways, for example, as 737665600 + 413674921 = 27160^2 + 20339^2 .

It is a cyclic number.

It is not a de Polignac number, because 1151340521 - 2²⁶ = 1084231657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1151345521) 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, 33862940 + ... + 33862973.

It is an arithmetic number, because the mean of its divisors is an integer number (304766613).

Almost surely, 2^1151340521 is an apocalyptic number.

It is an amenable number.

1151340521 is a deficient number, since it is larger than the sum of its proper divisors (67725931).

1151340521 is an equidigital number, since it uses as much as digits as its factorization.

1151340521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67725930.

The product of its (nonzero) digits is 600, while the sum is 23.

The square root of 1151340521 is about 33931.4090629906. The cubic root of 1151340521 is about 1048.0964820099.

The spelling of 1151340521 in words is "one billion, one hundred fifty-one million, three hundred forty thousand, five hundred twenty-one".