1101428 has 6 divisors (see below), whose sum is σ = 1927506. Its totient is φ = 550712.

The previous prime is 1101421. The next prime is 1101431. The reversal of 1101428 is 8241011.

It can be written as a sum of positive squares in only one way, i.e., 1024144 + 77284 = 1012^2 + 278^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1101421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 137675 + ... + 137682.

It is an arithmetic number, because the mean of its divisors is an integer number (321251).

2^1101428 is an apocalyptic number.

It is an amenable number.

1101428 is a deficient number, since it is larger than the sum of its proper divisors (826078).

1101428 is a wasteful number, since it uses less digits than its factorization.

1101428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275361 (or 275359 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

The square root of 1101428 is about 1049.4893996606. The cubic root of 1101428 is about 103.2726618057.

Adding to 1101428 its reverse (8241011), we get a palindrome (9342439).

It can be divided in two parts, 110 and 1428, that multiplied together give a triangular number (157080 = T₅₆₀).

The spelling of 1101428 in words is "one million, one hundred one thousand, four hundred twenty-eight".