1201428 has 36 divisors (see below), whose sum is σ = 3171168. Its totient is φ = 382800.

The previous prime is 1201381. The next prime is 1201439. The reversal of 1201428 is 8241021.

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 (18).

It is a self number, because there is not a number n which added to its sum of digits gives 1201428.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 103 + ... + 1553.

It is an arithmetic number, because the mean of its divisors is an integer number (88088).

2^1201428 is an apocalyptic number.

1201428 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1201428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1585584).

1201428 is an abundant number, since it is smaller than the sum of its proper divisors (1969740).

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

1201428 is a wasteful number, since it uses less digits than its factorization.

1201428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1484 (or 1479 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 1201428 is about 1096.0967110616. The cubic root of 1201428 is about 106.3079923322.

Adding to 1201428 its reverse (8241021), we get a palindrome (9442449).

The spelling of 1201428 in words is "one million, two hundred one thousand, four hundred twenty-eight".