1265550 has 96 divisors (see below), whose sum is σ = 3749760. Its totient is φ = 278400.

The previous prime is 1265549. The next prime is 1265557. The reversal of 1265550 is 555621.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1265550.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1265557) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 21421 + ... + 21479.

It is an arithmetic number, because the mean of its divisors is an integer number (39060).

2^1265550 is an apocalyptic number.

1265550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1265550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1874880).

1265550 is an abundant number, since it is smaller than the sum of its proper divisors (2484210).

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

1265550 is a wasteful number, since it uses less digits than its factorization.

1265550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98 (or 93 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 24.

The square root of 1265550 is about 1124.9666661728. The cubic root of 1265550 is about 108.1665810648.

The spelling of 1265550 in words is "one million, two hundred sixty-five thousand, five hundred fifty".