1153140521 has 8 divisors (see below), whose sum is σ = 1244034120. Its totient is φ = 1062559872.

The previous prime is 1153140509. The next prime is 1153140553. The reversal of 1153140521 is 1250413511.

It can be written as a sum of positive squares in 4 ways, for example, as 107329600 + 1045810921 = 10360^2 + 32339^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1153140521 is a prime.

It is a super-2 number, since 2×1153140521² = 2659466122344302882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1153140221) 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, 70550 + ... + 85343.

It is an arithmetic number, because the mean of its divisors is an integer number (155504265).

Almost surely, 2^1153140521 is an apocalyptic number.

It is an amenable number.

1153140521 is a deficient number, since it is larger than the sum of its proper divisors (90893599).

1153140521 is a wasteful number, since it uses less digits than its factorization.

1153140521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156475.

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

The square root of 1153140521 is about 33957.9228016085. The cubic root of 1153140521 is about 1048.6423938790.

The spelling of 1153140521 in words is "one billion, one hundred fifty-three million, one hundred forty thousand, five hundred twenty-one".