1172028 has 48 divisors (see below), whose sum is σ = 3217536. Its totient is φ = 327360.

The previous prime is 1172027. The next prime is 1172029. The reversal of 1172028 is 8202711.

It is an interprime number because it is at equal distance from previous prime (1172027) and next prime (1172029).

It is a junction number, because it is equal to n+sod(n) for n = 1171995 and 1172013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1172021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1375 + ... + 2057.

It is an arithmetic number, because the mean of its divisors is an integer number (67032).

2^1172028 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1172028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1608768).

1172028 is an abundant number, since it is smaller than the sum of its proper divisors (2045508).

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

1172028 is a wasteful number, since it uses less digits than its factorization.

1172028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 714 (or 712 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 21.

The square root of 1172028 is about 1082.6024200971. The cubic root of 1172028 is about 105.4336712368.

Adding to 1172028 its reverse (8202711), we get a palindrome (9374739).

It can be divided in two parts, 117 and 2028, that added together give a triangular number (2145 = T₆₅).

The spelling of 1172028 in words is "one million, one hundred seventy-two thousand, twenty-eight".