1091265 has 32 divisors (see below), whose sum is σ = 2104320. Its totient is φ = 471744.

The previous prime is 1091263. The next prime is 1091267. The reversal of 1091265 is 5621901.

It is an interprime number because it is at equal distance from previous prime (1091263) and next prime (1091267).

It is not a de Polignac number, because 1091265 - 2¹ = 1091263 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1091261) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1722 + ... + 2268.

It is an arithmetic number, because the mean of its divisors is an integer number (65760).

2^1091265 is an apocalyptic number.

1091265 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1091265 is a deficient number, since it is larger than the sum of its proper divisors (1013055).

1091265 is a wasteful number, since it uses less digits than its factorization.

1091265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 581.

The product of its (nonzero) digits is 540, while the sum is 24.

The square root of 1091265 is about 1044.6363003457. The cubic root of 1091265 is about 102.9540436577.

The spelling of 1091265 in words is "one million, ninety-one thousand, two hundred sixty-five".