1145256 has 64 divisors (see below), whose sum is σ = 3473280. Its totient is φ = 307200.

The previous prime is 1145227. The next prime is 1145269. The reversal of 1145256 is 6525411.

It is a super-2 number, since 2×1145256² = 2623222611072, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

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, 2656 + ... + 3056.

It is an arithmetic number, because the mean of its divisors is an integer number (54270).

2^1145256 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1145256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1736640).

1145256 is an abundant number, since it is smaller than the sum of its proper divisors (2328024).

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

1145256 is a wasteful number, since it uses less digits than its factorization.

1145256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434 (or 430 counting only the distinct ones).

The product of its digits is 1200, while the sum is 24.

The square root of 1145256 is about 1070.1663422104. The cubic root of 1145256 is about 104.6246918567.

The spelling of 1145256 in words is "one million, one hundred forty-five thousand, two hundred fifty-six".