11428511 has 2 divisors, whose sum is σ = 11428512. Its totient is φ = 11428510.

The previous prime is 11428507. The next prime is 11428517. The reversal of 11428511 is 11582411.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11428511 - 2² = 11428507 is a prime.

It is a super-3 number, since 3×11428511³ (a number of 22 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11428517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5714255 + 5714256.

It is an arithmetic number, because the mean of its divisors is an integer number (5714256).

Almost surely, 2^11428511 is an apocalyptic number.

11428511 is a deficient number, since it is larger than the sum of its proper divisors (1).

11428511 is an equidigital number, since it uses as much as digits as its factorization.

11428511 is an evil number, because the sum of its binary digits is even.

The product of its digits is 320, while the sum is 23.

The square root of 11428511 is about 3380.6080813960. The cubic root of 11428511 is about 225.2491790856.

The spelling of 11428511 in words is "eleven million, four hundred twenty-eight thousand, five hundred eleven".