1245040 has 40 divisors (see below), whose sum is σ = 2946240. Its totient is φ = 489216.

The previous prime is 1245037. The next prime is 1245067. The reversal of 1245040 is 405421.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is an unprimeable number.

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, 6222 + ... + 6418.

It is an arithmetic number, because the mean of its divisors is an integer number (73656).

2^1245040 is an apocalyptic number.

1245040 is a gapful number since it is divisible by the number (10) 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 1245040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1473120).

1245040 is an abundant number, since it is smaller than the sum of its proper divisors (1701200).

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

1245040 is a wasteful number, since it uses less digits than its factorization.

1245040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289 (or 283 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 1245040 is about 1115.8136045057. The cubic root of 1245040 is about 107.5790656841.

1245040 divided by its sum of digits (16) gives a triangular number (77815 = T₃₉₄).

The spelling of 1245040 in words is "one million, two hundred forty-five thousand, forty".