1131671521 has 8 divisors (see below), whose sum is σ = 1261306080. Its totient is φ = 1009044288.

The previous prime is 1131671503. The next prime is 1131671533. The reversal of 1131671521 is 1251761311.

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 1131671521 - 2¹³ = 1131663329 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1131671521.

It is not an unprimeable number, because it can be changed into a prime (1131671501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1751491 + ... + 1752136.

It is an arithmetic number, because the mean of its divisors is an integer number (157663260).

Almost surely, 2^1131671521 is an apocalyptic number.

It is an amenable number.

1131671521 is a deficient number, since it is larger than the sum of its proper divisors (129634559).

1131671521 is a wasteful number, since it uses less digits than its factorization.

1131671521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3503663.

The product of its digits is 1260, while the sum is 28.

The square root of 1131671521 is about 33640.3258159014. The cubic root of 1131671521 is about 1042.0937605589.

The spelling of 1131671521 in words is "one billion, one hundred thirty-one million, six hundred seventy-one thousand, five hundred twenty-one".