1491265 has 8 divisors (see below), whose sum is σ = 1807848. Its totient is φ = 1180800.

The previous prime is 1491247. The next prime is 1491271. The reversal of 1491265 is 5621941.

1491265 = 863² + 864².

It can be written as a sum of positive squares in 4 ways, for example, as 744769 + 746496 = 863^2 + 864^2 .

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

It is not a de Polignac number, because 1491265 - 2⁵ = 1491233 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 972 + ... + 1981.

It is an arithmetic number, because the mean of its divisors is an integer number (225981).

2^1491265 is an apocalyptic number.

1491265 is the 864-th centered square number.

It is an amenable number.

1491265 is a deficient number, since it is larger than the sum of its proper divisors (316583).

1491265 is a wasteful number, since it uses less digits than its factorization.

1491265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3059.

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

The square root of 1491265 is about 1221.1736158303. The cubic root of 1491265 is about 114.2487897827.

The spelling of 1491265 in words is "one million, four hundred ninety-one thousand, two hundred sixty-five".