1275144 has 64 divisors (see below), whose sum is σ = 3541440. Its totient is φ = 380160.

The previous prime is 1275133. The next prime is 1275173. The reversal of 1275144 is 4415721.

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

It is an Ulam 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, 18999 + ... + 19065.

It is an arithmetic number, because the mean of its divisors is an integer number (55335).

2^1275144 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 1275144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1770720).

1275144 is an abundant number, since it is smaller than the sum of its proper divisors (2266296).

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

1275144 is a wasteful number, since it uses less digits than its factorization.

1275144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150 (or 146 counting only the distinct ones).

The product of its digits is 1120, while the sum is 24.

The square root of 1275144 is about 1129.2227415351. Note that the first 3 decimals coincide. The cubic root of 1275144 is about 108.4392263731.

The spelling of 1275144 in words is "one million, two hundred seventy-five thousand, one hundred forty-four".