111420 has 36 divisors (see below), whose sum is σ = 338520. Its totient is φ = 29664.

The previous prime is 111409. The next prime is 111427. The reversal of 111420 is 24111.

111420 = 32² + 33² + ... + 71².

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111427) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 130 + ... + 489.

2¹¹¹⁴²⁰ is an apocalyptic number.

111420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111420 is an abundant number, since it is smaller than the sum of its proper divisors (227100).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

111420 is a wasteful number, since it uses less digits than its factorization.

111420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 634 (or 629 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 111420 is about 333.7963450968. The cubic root of 111420 is about 48.1194939448.

Adding to 111420 its reverse (24111), we get a palindrome (135531).

It can be divided in two parts, 11 and 1420, that added together give a triangular number (1431 = T₅₃).

The spelling of 111420 in words is "one hundred eleven thousand, four hundred twenty", and thus it is an iban number.