1245128 has 32 divisors (see below), whose sum is σ = 2496960. Its totient is φ = 580800.

The previous prime is 1245121. The next prime is 1245137. The reversal of 1245128 is 8215421.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is not an unprimeable number, because it can be changed into a prime (1245121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12278 + ... + 12378.

It is an arithmetic number, because the mean of its divisors is an integer number (78030).

2^1245128 is an apocalyptic number.

It is an amenable number.

1245128 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

1245128 is a wasteful number, since it uses less digits than its factorization.

1245128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197 (or 193 counting only the distinct ones).

The product of its digits is 640, while the sum is 23.

The square root of 1245128 is about 1115.8530369184. The cubic root of 1245128 is about 107.5816002037.

The spelling of 1245128 in words is "one million, two hundred forty-five thousand, one hundred twenty-eight".