111423261 has 4 divisors (see below), whose sum is σ = 148564352. Its totient is φ = 74282172.

The previous prime is 111423251. The next prime is 111423343. The reversal of 111423261 is 162324111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 111423261 - 2⁶ = 111423197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111423241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18570541 + ... + 18570546.

It is an arithmetic number, because the mean of its divisors is an integer number (37141088).

Almost surely, 2^111423261 is an apocalyptic number.

It is an amenable number.

111423261 is a deficient number, since it is larger than the sum of its proper divisors (37141091).

111423261 is an equidigital number, since it uses as much as digits as its factorization.

111423261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37141090.

The product of its digits is 288, while the sum is 21.

The square root of 111423261 is about 10555.7217185752. The cubic root of 111423261 is about 481.1996338812.

Adding to 111423261 its reverse (162324111), we get a palindrome (273747372).

It can be divided in two parts, 111 and 423261, that multiplied together give a triangular number (46981971 = T₉₆₉₃).

The spelling of 111423261 in words is "one hundred eleven million, four hundred twenty-three thousand, two hundred sixty-one".