111128461 has 2 divisors, whose sum is σ = 111128462. Its totient is φ = 111128460.

The previous prime is 111128401. The next prime is 111128467. The reversal of 111128461 is 164821111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110775625 + 352836 = 10525^2 + 594^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111128461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111128467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55564230 + 55564231.

It is an arithmetic number, because the mean of its divisors is an integer number (55564231).

Almost surely, 2^111128461 is an apocalyptic number.

It is an amenable number.

111128461 is a deficient number, since it is larger than the sum of its proper divisors (1).

111128461 is an equidigital number, since it uses as much as digits as its factorization.

111128461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 384, while the sum is 25.

The square root of 111128461 is about 10541.7484792609. The cubic root of 111128461 is about 480.7748783366.

Adding to 111128461 its reverse (164821111), we get a palindrome (275949572).

The spelling of 111128461 in words is "one hundred eleven million, one hundred twenty-eight thousand, four hundred sixty-one".