1145040 has 80 divisors (see below), whose sum is σ = 3833088. Its totient is φ = 281088.

The previous prime is 1145021. The next prime is 1145057. The reversal of 1145040 is 405411.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×1145040² = 2622233203200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2937 + ... + 3303.

2^1145040 is an apocalyptic number.

1145040 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 1145040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1916544).

1145040 is an abundant number, since it is smaller than the sum of its proper divisors (2688048).

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

1145040 is a wasteful number, since it uses less digits than its factorization.

1145040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396 (or 390 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 1145040 is about 1070.0654185609. The cubic root of 1145040 is about 104.6181138938.

The spelling of 1145040 in words is "one million, one hundred forty-five thousand, forty".