1210428 has 18 divisors (see below), whose sum is σ = 3059784. Its totient is φ = 403464.

The previous prime is 1210427. The next prime is 1210439. The reversal of 1210428 is 8240121.

It is a tau number, because it is divible by the number of its divisors (18).

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 1210428.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1210427) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16776 + ... + 16847.

It is an arithmetic number, because the mean of its divisors is an integer number (169988).

2^1210428 is an apocalyptic number.

1210428 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1210428 is an abundant number, since it is smaller than the sum of its proper divisors (1849356).

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

1210428 is a wasteful number, since it uses less digits than its factorization.

1210428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33633 (or 33628 counting only the distinct ones).

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

The square root of 1210428 is about 1100.1945282540. The cubic root of 1210428 is about 106.5727863211.

Adding to 1210428 its reverse (8240121), we get a palindrome (9450549).

It can be divided in two parts, 12 and 10428, that added together give a triangular number (10440 = T₁₄₄).

The spelling of 1210428 in words is "one million, two hundred ten thousand, four hundred twenty-eight".