11428531 has 2 divisors, whose sum is σ = 11428532. Its totient is φ = 11428530.

The previous prime is 11428517. The next prime is 11428559. The reversal of 11428531 is 13582411.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11428531 - 2⁵ = 11428499 is a prime.

It is a super-2 number, since 2×11428531² = 261222641635922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11428496 and 11428505.

It is not a weakly prime, because it can be changed into another prime (11428511) 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 as a sum of consecutive naturals, namely, 5714265 + 5714266.

It is an arithmetic number, because the mean of its divisors is an integer number (5714266).

Almost surely, 2^11428531 is an apocalyptic number.

11428531 is a deficient number, since it is larger than the sum of its proper divisors (1).

11428531 is an equidigital number, since it uses as much as digits as its factorization.

11428531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 960, while the sum is 25.

The square root of 11428531 is about 3380.6110394424. The cubic root of 11428531 is about 225.2493104816.

The spelling of 11428531 in words is "eleven million, four hundred twenty-eight thousand, five hundred thirty-one".