1249428 has 12 divisors (see below), whose sum is σ = 2915360. Its totient is φ = 416472.

The previous prime is 1249427. The next prime is 1249433. The reversal of 1249428 is 8249421.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×1249428² = 3122140654368, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1249395 and 1249404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1249427) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 52048 + ... + 52071.

2^1249428 is an apocalyptic number.

It is an amenable number.

1249428 is an abundant number, since it is smaller than the sum of its proper divisors (1665932).

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

1249428 is a wasteful number, since it uses less digits than its factorization.

1249428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104126 (or 104124 counting only the distinct ones).

The product of its digits is 4608, while the sum is 30.

The square root of 1249428 is about 1117.7781533023. The cubic root of 1249428 is about 107.7053008394.

The spelling of 1249428 in words is "one million, two hundred forty-nine thousand, four hundred twenty-eight".