1265491 has 8 divisors (see below), whose sum is σ = 1306800. Its totient is φ = 1224960.

The previous prime is 1265479. The next prime is 1265503. The reversal of 1265491 is 1945621.

It is an interprime number because it is at equal distance from previous prime (1265479) and next prime (1265503).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1265491 - 2⁹ = 1264979 is a prime.

It is a Duffinian number.

1265491 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1265431) 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, 5131 + ... + 5371.

It is an arithmetic number, because the mean of its divisors is an integer number (163350).

2^1265491 is an apocalyptic number.

1265491 is a deficient number, since it is larger than the sum of its proper divisors (41309).

1265491 is an equidigital number, since it uses as much as digits as its factorization.

1265491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389.

The product of its digits is 2160, while the sum is 28.

The square root of 1265491 is about 1124.9404428680. The cubic root of 1265491 is about 108.1649001283.

The spelling of 1265491 in words is "one million, two hundred sixty-five thousand, four hundred ninety-one".