1264428 has 72 divisors (see below), whose sum is σ = 3634176. Its totient is φ = 367200.

The previous prime is 1264411. The next prime is 1264447. The reversal of 1264428 is 8244621.

1264428 is a `hidden beast` number, since 12 + 644 + 2 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12225 + ... + 12327.

2^1264428 is an apocalyptic number.

1264428 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 1264428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1817088).

1264428 is an abundant number, since it is smaller than the sum of its proper divisors (2369748).

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

1264428 is a wasteful number, since it uses less digits than its factorization.

1264428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155 (or 150 counting only the distinct ones).

The product of its digits is 3072, while the sum is 27.

The square root of 1264428 is about 1124.4678741520. The cubic root of 1264428 is about 108.1346058268.

It can be divided in two parts, 126 and 4428, that added together give a palindrome (4554).

The spelling of 1264428 in words is "one million, two hundred sixty-four thousand, four hundred twenty-eight".