1151243521 has 8 divisors (see below), whose sum is σ = 1181021184. Its totient is φ = 1121686080.

The previous prime is 1151243491. The next prime is 1151243539. The reversal of 1151243521 is 1253421511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1151243521 - 2⁷ = 1151243393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1151243591) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44440 + ... + 65401.

It is an arithmetic number, because the mean of its divisors is an integer number (147627648).

Almost surely, 2^1151243521 is an apocalyptic number.

It is an amenable number.

1151243521 is a deficient number, since it is larger than the sum of its proper divisors (29777663).

1151243521 is a wasteful number, since it uses less digits than its factorization.

1151243521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110111.

The product of its digits is 1200, while the sum is 25.

The square root of 1151243521 is about 33929.9796787443. The cubic root of 1151243521 is about 1048.0670472736.

The spelling of 1151243521 in words is "one billion, one hundred fifty-one million, two hundred forty-three thousand, five hundred twenty-one".