101428 has 6 divisors (see below), whose sum is σ = 177506. Its totient is φ = 50712.

The previous prime is 101419. The next prime is 101429. The reversal of 101428 is 824101.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 79524 + 21904 = 282^2 + 148^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101429) by changing a digit.

101428 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12675 + ... + 12682.

2¹⁰¹⁴²⁸ is an apocalyptic number.

It is an amenable number.

101428 is a deficient number, since it is larger than the sum of its proper divisors (76078).

101428 is a wasteful number, since it uses less digits than its factorization.

101428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25361 (or 25359 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 101428 is about 318.4776287277. The cubic root of 101428 is about 46.6357845566.

Adding to 101428 its reverse (824101), we get a palindrome (925529).

It can be divided in two parts, 101 and 428, that added together give a square (529 = 23²).

The spelling of 101428 in words is "one hundred one thousand, four hundred twenty-eight".