8521131 has 8 divisors (see below), whose sum is σ = 12029904. Its totient is φ = 5346560.

The previous prime is 8521129. The next prime is 8521133. The reversal of 8521131 is 1311258.

It is an interprime number because it is at equal distance from previous prime (8521129) and next prime (8521133).

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 8521131 - 2¹ = 8521129 is a prime.

It is a super-2 number, since 2×8521131² = 145219347038322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 8521098 and 8521107.

It is not an unprimeable number, because it can be changed into a prime (8521133) 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, 83490 + ... + 83591.

It is an arithmetic number, because the mean of its divisors is an integer number (1503738).

Almost surely, 2^8521131 is an apocalyptic number.

8521131 is a deficient number, since it is larger than the sum of its proper divisors (3508773).

8521131 is a wasteful number, since it uses less digits than its factorization.

8521131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167101.

The product of its digits is 240, while the sum is 21.

The square root of 8521131 is about 2919.0976345439. The cubic root of 8521131 is about 204.2517317242.

Adding to 8521131 its reverse (1311258), we get a palindrome (9832389).

The spelling of 8521131 in words is "eight million, five hundred twenty-one thousand, one hundred thirty-one".