1291145 has 8 divisors (see below), whose sum is σ = 1631040. Its totient is φ = 978480.

The previous prime is 1291139. The next prime is 1291153. The reversal of 1291145 is 5411921.

It is a happy number.

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

It is not a de Polignac number, because 1291145 - 2¹⁸ = 1029001 is a prime.

It is a super-2 number, since 2×1291145² = 3334110822050, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1291145.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6701 + ... + 6890.

It is an arithmetic number, because the mean of its divisors is an integer number (203880).

2^1291145 is an apocalyptic number.

It is an amenable number.

1291145 is a deficient number, since it is larger than the sum of its proper divisors (339895).

1291145 is a wasteful number, since it uses less digits than its factorization.

1291145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13615.

The product of its digits is 360, while the sum is 23.

The square root of 1291145 is about 1136.2856155034. The cubic root of 1291145 is about 108.8909213760.

The spelling of 1291145 in words is "one million, two hundred ninety-one thousand, one hundred forty-five".