1261288 has 32 divisors (see below), whose sum is σ = 2741760. Its totient is φ = 532800.

The previous prime is 1261279. The next prime is 1261289. The reversal of 1261288 is 8821621.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (1261289) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5545 + ... + 5767.

It is an arithmetic number, because the mean of its divisors is an integer number (85680).

2^1261288 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 1261288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1370880).

1261288 is an abundant number, since it is smaller than the sum of its proper divisors (1480472).

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

1261288 is a wasteful number, since it uses less digits than its factorization.

1261288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337 (or 333 counting only the distinct ones).

The product of its digits is 1536, while the sum is 28.

The square root of 1261288 is about 1123.0707902888. The cubic root of 1261288 is about 108.0450200967.

The spelling of 1261288 in words is "one million, two hundred sixty-one thousand, two hundred eighty-eight".