1091428 has 24 divisors (see below), whose sum is σ = 2085440. Its totient is φ = 496800.

The previous prime is 1091413. The next prime is 1091443. The reversal of 1091428 is 8241901.

It is a happy number.

1091428 is nontrivially palindromic in base 12.

It is an interprime number because it is at equal distance from previous prime (1091413) and next prime (1091443).

It is a zygodrome in base 12.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7153 + ... + 7303.

2^1091428 is an apocalyptic number.

It is an amenable number.

1091428 is a deficient number, since it is larger than the sum of its proper divisors (994012).

1091428 is a wasteful number, since it uses less digits than its factorization.

1091428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307 (or 305 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 1091428 is about 1044.7143150163. The cubic root of 1091428 is about 102.9591694135.

The spelling of 1091428 in words is "one million, ninety-one thousand, four hundred twenty-eight".